Effects of high-intensity interval training versus sprint interval training during the second wave of COVID-19 lockdown on soccer players

array:22 ["pii" => "S2666506923000135" "issn" => "26665069" "doi" => "10.1016/j.apunsm.2023.100414" "estado" => "S300" "fechaPublicacion" => "2023-04-01" "aid" => "100414" "copyright" => "CONSELL CATALÀ DE L'ESPORT" "copyrightAnyo" => "2023" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "itemSiguiente" => array:17 [ "pii" => "S2666506923000123" "issn" => "26665069" "doi" => "10.1016/j.apunsm.2023.100413" "estado" => "S300" "fechaPublicacion" => "2023-04-01" "aid" => "100413" "copyright" => "CONSELL CATALÀ DE L'ESPORT" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "en" => array:11 [ "idiomaDefecto" => true "cabecera" => "Special article" "titulo" => "Physical performance preparation for the cerebral palsy football world cup: A team study" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => "en" "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1250 "Ancho" => 3500 "Tamanyo" => 179993 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0001" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "Preparation period for the 2022 IFCPF World Cup, including the dates of TC and training programs between them. Mar: March; Jun: June; Oct: October; Feb: February; Apr: April; TC: training camp; IFCPF: International Federation of Cerebral Palsy Football; FT: football trainings; ST: strength training; HIIT: high-intensity interval training; RT: resistance training." ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Iván Peña-González, Manuel Moya-Ramón" "autores" => array:2 [ 0 => array:2 [ "nombre" => "Iván" "apellidos" => "Peña-González" ] 1 => array:2 [ "nombre" => "Manuel" "apellidos" => "Moya-Ramón" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000123?idApp=UINPBA00004N" "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000123/v2_202406100409/en/main.assets" ] "itemAnterior" => array:17 [ "pii" => "S2666506923000111" "issn" => "26665069" "doi" => "10.1016/j.apunsm.2023.100412" "estado" => "S300" "fechaPublicacion" => "2023-04-01" "aid" => "100412" "copyright" => "CONSELL CATALÀ DE L'ESPORT" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "en" => array:11 [ "idiomaDefecto" => true "cabecera" => "Original Article" "titulo" => "Successful outcomes after surgical treatment of chronic complete proximal hamstring avulsions in female athletes older than 55 years" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => "en" "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0003" "etiqueta" => "Fig. 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 1889 "Ancho" => 3350 "Tamanyo" => 499693 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0003" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "Release of the stump. The sciatic nerve is seen attached to the myotendinous junction (star)." ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Alejandro Salido, Rosa López-Vidriero, Rafael Fernández Arteaga, Manuel Halcón, Emilio López-Vidriero" "autores" => array:5 [ 0 => array:2 [ "nombre" => "Alejandro" "apellidos" => "Salido" ] 1 => array:2 [ "nombre" => "Rosa" "apellidos" => "López-Vidriero" ] 2 => array:2 [ "nombre" => "Rafael Fernández" "apellidos" => "Arteaga" ] 3 => array:2 [ "nombre" => "Manuel" "apellidos" => "Halcón" ] 4 => array:2 [ "nombre" => "Emilio" "apellidos" => "López-Vidriero" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000111?idApp=UINPBA00004N" "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000111/v2_202406100409/en/main.assets" ] "en" => array:18 [ "idiomaDefecto" => true "cabecera" => "Original Article" "titulo" => "Effects of high-intensity interval training versus sprint interval training during the second wave of COVID-19 lockdown on soccer players" "tieneTextoCompleto" => true "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Thomakos Pierros, Konstantinos Spyrou" "autores" => array:2 [ 0 => array:3 [ "nombre" => "Thomakos" "apellidos" => "Pierros" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "a" "identificador" => "aff0001" ] ] ] 1 => array:4 [ "nombre" => "Konstantinos" "apellidos" => "Spyrou" "email" => array:1 [ 0 => "kspyrou@ucam.edu" ] "referencia" => array:3 [ 0 => array:2 [ "etiqueta" => "b" "identificador" => "aff0002" ] 1 => array:2 [ "etiqueta" => "c" "identificador" => "aff0003" ] 2 => array:2 [ "etiqueta" => "*" "identificador" => "cor0001" ] ] ] ] "afiliaciones" => array:3 [ 0 => array:3 [ "entidad" => "School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece" "etiqueta" => "a" "identificador" => "aff0001" ] 1 => array:3 [ "entidad" => "UCAM Research Center for High Performance Sport, UCAM Universidad Catόlica de Murcia, Murcia, Spain" "etiqueta" => "b" "identificador" => "aff0002" ] 2 => array:3 [ "entidad" => "Facultad de Deporte, UCAM Universidad Católica de Murcia, Murcia, Spain" "etiqueta" => "c" "identificador" => "aff0003" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0001" "etiqueta" => "⁎" "correspondencia" => "Corresponding author at: UCAM Research Center for High Performance Sport, UCAM Universidad Catόlica de Murcia, Murcia, Spain." ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 880 "Ancho" => 1667 "Tamanyo" => 59066 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0001" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "Countermovement jump pre- and post-4-week program. ***Statistically significant difference (p<0.001) pre and post. HIIT: High-Intensity Interval Training; SIT: Sprint Interval Training." ] ] ] "textoCompleto" => "IntroductionThese last years, due to the COVID-19, sport leagues, tournaments, and athlete´s regulations changed worldwide.<a class="elsevierStyleCrossRef" href="#bib0001">1</a> During the COVID-19 era, players’ training and game schedule, physical performance, nutrition, and sleep habits were affected.<a class="elsevierStyleCrossRef" href="#bib0002">2</a>,<a class="elsevierStyleCrossRef" href="#bib0003">3</a> The easy transmission of the virus prompted sports authorities to take restrictive measures for athletes who were infected. For example, soccer players were forced into quarantine lasting from 15 days (during the first months, June – November 2020, following the obligatory lockdown) until 3 days (December 2021– February 2022), in case that athlete´s condition was adequate. Specifically, in the second wave of the pandemic (early November 2020– January 2021), Super League (1st Division of Greece), 2nd, 3rd Division of Greece, and regional leagues were interrupted after the 3rd fixture. The authorities proceeded to a training restriction on 7/11/2020 setting for a possible re-start of the league in January 2021.During the first lockdown (i.e., end of February 2020 – May 2020), home-based training programs and nutritional instructions were provided to soccer players in order to maintain fitness levels for the re-start of competition.<a class="elsevierStyleCrossRefs" href="#bib0002">2-5</a> However, several studies demonstrated that such strategies were not as effective as expected since declines in physical performance and more injuries were reported in different team-sports.<a class="elsevierStyleCrossRefs" href="#bib0006">6-12</a> For example, a study with professional Brazilian soccer players revealed significant decreases in countermovement jump (CMJ) and sprint (i.e., 10 and 20 m) performances after the quarantine.<a class="elsevierStyleCrossRef" href="#bib0013">13</a> Similarly, another study<a class="elsevierStyleCrossRef" href="#bib0014">14</a> demonstrated that elite soccer players, despite being able to maintain CMJ height, significantly declined in metrics such as reactive strength index, and peak concentric and eccentric power during the lockdown. However, additional research in neuromuscular and physiological components is still needed to better understand the effects of different high intensity programs applied during the second wave of COVID-19 quarantine through the course of the competitive season as most of the studies used moderate load training regimes.The purpose of this study was to compare two 4-week intervention programs, high-intensity interval training (HIIT) and sprint interval training (SIT) applied during the second wave of COVID-19, in aerobic capacity and jumping ability in semi-professional soccer players. It was hypothesized that endurance and neuromuscular capacity would improve for both groups (i.e., HIIT and SIT).Material and methodsStudy designAn experimental study was designed to compare two intervention programs of 4 weeks, in aerobic (i.e., YO – YO Intermittent Recovery [IR] 1) and jumping capacity (i.e., CMJ height). All participants were familiar with the performance evaluations as they regularly completed them every season. Because of the COVID-19 pandemic, Greek professional and semi-professional leagues were interrupted after the 3rd fixture (November 2020) until March 2021. During the intermission, two different intervention programs were implemented (i.e., HIIT and SIT). In the 1st week, players realized a COVID-19 rapid test, and after negative results they proceeded to the measurements. Body composition and anthropometric measurements were completed in the morning (08:00 a.m.), while the vertical jump and endurance field test were performed in the afternoon (16:30 p.m.). In the 5th week (i.e., after the 4-week intervention period), players repeated the measurements, in the same way, order, and with the same researchers. Players who contracted the virus or got injured during the lockdown were excluded from the study.ParticipantsTwenty-nine semi-professional soccer players of two teams participated. Sixteen of them (age: 19.6 ± 2.4 years, height: 1.8 ± 0.5 m, weight: 71.5 ± 4.6 kg and body fat: 7.3 ± 2.6%) were in the HIIΤ group and competed in 3rd National Division of Greece, while the other thirteen (age: 23.5 ± 5.1 years, height: 1.8 ± 0.1 m, weight: 74.0 ± 4.5 kg and body fat: 8.8 ± 2.6%) were in SIT group and competed 4th Division of Greece. All players were healthy, do not have any injury, and did not receive any medication or illegal nutritional supplements. All procedures were in accordance with the Declaration of Helsinki of 1975, as revised in 2000 and approved by the university ethics committee, while all participants signed a written informed consent before entering in the research procedure.ProceduresTraining protocolsHIIΤ group performed 3 running-based sessions without a ball per week and 2 weekly strength training workouts using free weights. In the 1st week, the aerobic training was prescribed as follows: 6 sets of 6 min at 85% of vV̇O2max. The 2nd week consisted of 4 sets of 6 min at 90% of vV̇O2max and the 3rd week contemplated two sessions in which players performed 5 sets of 4 min and a third session of 4 sets of 4 min at 95% of vV̇O2max. Finally, in the last week, 4 sets of 4 min at 100% of vV̇O2max were completed in each session. A 3 min recovery between sets was prescribed (<a class="elsevierStyleCrossRef" href="#tbl0001">Table 1</a>). Strength training consisted of bench press, half-squat, clean, hip-trust, leg flexion and extension (i.e., 3–5 sets with 3–8 repetitions), with 1 min rest between sets for each exercise and with 3 min rest between exercises and intensity from 65 to 95% of 1RM was prescribed.<elsevierMultimedia ident="tbl0001"></elsevierMultimedia>SIT group completed 3 running-based sessions per week, without a ball, and 2 body weight circuit training sessions a week. Players performed in the 1st training, 1 round with 10 sets with 10 s running at 95% vV̇O2max and 20 s rest. In the 2nd training, 2 rounds of 8 sets with 30 s running at 100% vV̇O2max and 30 s rest. Lastly, in the 3rd training contained 2 rounds with 3 sets of 2 min running at 105% vV̇O2max and 2 min rest. This program repeated every week with total running duration 33 min (<a class="elsevierStyleCrossRef" href="#tbl0001">Table 1</a>). The strength training program was the same during the 4 weeks and consisted of push-ups, squats, TRX row, dumbbell row, jumping jack, mountain climbers four sets with 30 s work and 30 s rest for all exercises and 3 min rest between sets.Vertical jumpCMJ performed on an electronic contact mat (CHRONOJUMP – Bosco system, Din-A4 297 × 210 m, Spain). Players were instructed to perform a downward movement until 90° knee flexion followed by a complete extension of the lower limbs with the hands fixed on the hips during the entire movement. Three separate jumps on the platform with the aim of achieving maximal jump height, with 30 s of recovery between jumps were allowed. The highest of the 3 jumps was selected as measured by flight time calculations.<a class="elsevierStyleCrossRef" href="#bib0015">15</a>Aerobic capacityThe YO-YO IR 1 used to evaluate aerobic capacity. The test consisted of repeated 2 × 20 m runs back and forth between the starting, turning, and finishing line at a progressively increased speed controlled by audio beeps from a CD computer with speakers. Between each running bout, the subjects had a 10 s active rest period, consisting of 2 × 5 m of jogging. The test ended when the subjects failed twice to reach the finishing line within the available time and the total distance covered was recorded. V̇O2max was then derived from Bangsbo´s equation.<a class="elsevierStyleCrossRef" href="#bib0016">16</a> The speed of V̇O2max (vV̇O2max) was estimated from previously published equations.<a class="elsevierStyleCrossRef" href="#bib0017">17</a> Heart rate (HR) was recorded for each player every 5 s using a monitor with belt wireless strapped around the chest (Suunto Team POD, Dual Comfort Belt, Finland).Statistical analysisΤhe statistical analysis was performed with the STATISTICA software (Version 12, USA). A two-way ANOVA with repeated measures pre- and post-COVID-19 restriction of two groups was used. If a significant interaction was found, post-hoc was performed and an Unequal N HSD t-test analysis was used. Cohen's effect sizes (ESs) with 95% confidence intervals (95% CI) were computed to determine the magnitude of every paired comparison and classified as: trivial (<0.2), small (>0.2–0.6), moderate (>0.6–1.2), large (>1.2–2.0), and very large (>2.0–4.0).<a class="elsevierStyleCrossRef" href="#bib0018">18</a> The level of significance was set at p<0.05.ResultsAll data are presented as mean and standard deviation (SD). Significant differences (p<0.05) were found in total training time in HIIΤ when compared to SIT (<a class="elsevierStyleCrossRef" href="#tbl0002">Table 2</a>). No significant differences were found between the two groups (HIIT versus SIT) in body fat, height, and weight (p>0.05), however, HIIT group were significant younger than SIT group (p<0.05). No significant differences were observed in pre-COVID-19 evaluations between groups. Following the 4-week program, the HIIT group covered a significantly greater distance in YO-YO IR1 (p<0.001; ES: 2.7; 95% CI: 3.7 – 1.6), while achieving higher V̇O2max (p<0.001; ES: 2.7; 95% CI: 3.7 – 1.6), vV̇O2max (p<0.001; ES: 2.7; 95% CI: 3.7 – 1.6), CMJ height (p<0.001; ES: 1.6; 95% CI: 2.3 – 0.8), and lower value of HRmax (p<0.01; ES: 0.8; 95% CI: 0.2 – 0.8) when compared to the baseline (<a class="elsevierStyleCrossRef" href="#fig0001">Fig. 1</a> and <a class="elsevierStyleCrossRef" href="#tbl0003">Table 3</a>). Considering post measurements between group differences, greater (p<0.05) distance covered, V̇O2max and vV̇O2max were found in HIIΤ group when compared to SIΤ (<a class="elsevierStyleCrossRef" href="#tbl0003">Table 3</a>).<elsevierMultimedia ident="tbl0002"></elsevierMultimedia><elsevierMultimedia ident="fig0001"></elsevierMultimedia><elsevierMultimedia ident="tbl0003"></elsevierMultimedia>DiscussionThe aim of the present 4-week study was to evaluate the effects of two training programs (HIIT versus SIT) on the performance of semi-professional soccer players during the 2nd wave of COVID-19. The main results were the following: 1) significant pre-post improvements were found in the HIIT group for YO-YO IR 1 total distance, V̇O2max, vV̇O2max, CMJ height, and HRmax following the 4-week intervention; 2) non-significant differences were obtained in the same variables for the SIT group; and 3) the HIIT protocol yielded superior adaptations as seen by the significant differences found in YO-YO IR1 variables at post-test when compared to SIT.Regarding endurance capacity, significant pre-post improvements were found in the HIIT group for YO-YO IR 1 total distance, V̇O2max, vV̇O2max, and HRmax following the 4-week intervention. To author´s knowledge, this is the first study to research about the high-intensity training regimen during COVID-19 restriction. These results could be explained by the intensity (i.e., vVO2max), as higher velocity than V̇O2max, cardiac output and stroke volume reach lower values than at lower V̇O2max velocity.<a class="elsevierStyleCrossRef" href="#bib0019">19</a> Also, the enzymatic adaptations related to anaerobic capacity, training intensity should be near to maximum (∼90% VO2max) and for this may explain the results obtained in the SIT group that remained unchanged.<a class="elsevierStyleCrossRef" href="#bib0020">20</a>,<a class="elsevierStyleCrossRef" href="#bib0021">21</a> The findings of the present research are in line with the research of Helgerud et al.,<a class="elsevierStyleCrossRef" href="#bib0022">22</a> who applied HIIT and moderate-intensity continuous running programs for 4 weeks and found that HIIT significantly improved V̇O2max when compared to moderate intensity running. In the present study, the duration of the SIT program was short and the maximum intensity exceeded vV̇O2max, with the result other cardiorespiratory and neuromuscular adaptations were involved<a class="elsevierStyleCrossRef" href="#bib0020">20</a>,<a class="elsevierStyleCrossRef" href="#bib0023">23</a>. In applied settings, intensities close to V̇O2max may be better solution to improve the aerobic-anaerobic performance when compared to SIT program in a short-term period without competition in semi-professional soccer players.Considering jumping ability, no significant changes were observed in the SIT group while the HIIT group jumped higher after the 4-week training program (despite the absence of between-group differences at post-test). This could be explained, at least in part, by the fact that the resistance training and HIIT sessions were not performed in the same day and sufficient recovery was provided between the training sessions in order to avoid interference phenomenon.<a class="elsevierStyleCrossRef" href="#bib0024">24</a>,<a class="elsevierStyleCrossRef" href="#bib0025">25</a> The difference between pre-season and the 4-week intervention period during in-season, was the level of fatigue that players were exposed to, as in the current study, the 4-week period was not considered as preparation period, because of the government's regulations (maximum 1 h training exposure and individually training) and lack of soccer-specific training schemes. During the pre-season period in soccer, there is high level of training stress, with double training sessions, and friendly matches.<a class="elsevierStyleCrossRef" href="#bib0021">21</a>,<a class="elsevierStyleCrossRef" href="#bib0024">24</a>,<a class="elsevierStyleCrossRef" href="#bib0026">26</a>,<a class="elsevierStyleCrossRef" href="#bib0027">27</a> Lastly, circuit body weight training could maintain the CMJ height, however, it did not present further improvements.This study is limited by its design; however, it is important to highlight that subjects were part of soccer teams where each coaching staff decided the intervention program. Furthermore, no further information was registered, such as the rating of perceive exertion or technology tracking system for the training session, which could complement the load of the training. More neuromuscular tests (i.e., sprint, change of direction, and CMJ jump landing metrics) is warranted in order to detect the effects of the 4 weeks break of competitive season because of second wave of COVID-19 lockdown.ConclusionIn conclusion, the present study demonstrated HIIT improved endurance and vertical jump height when compared to SIT. Moreover, intensities close to V̇O2max may be a better solution to improve the aerobic performance when compared to SIT program in a short-term period without competition in semi-professional soccer players.Practical applicationsDuring the sudden interruption due to the spread and transmission of COVID-19 or in similar cases of detraining periods, sports practitioners may use a similar intervention program to HIIT in order to improve the endurance and jumping capacity. In addition, the present study demonstrated that the SIT program was not effective in increasing endurance capacity in semi-professional soccer players in short-term preparation period." "textoCompletoSecciones" => array:1 [ "secciones" => array:9 [ 0 => array:3 [ "identificador" => "xres2162606" "titulo" => "Abstract" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abss0001" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec1834647" "titulo" => "Keywords" ] 2 => array:2 [ "identificador" => "sec0001" "titulo" => "Introduction" ] 3 => array:3 [ "identificador" => "sec0002" "titulo" => "Material and methods" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "sec0003" "titulo" => "Study design" ] 1 => array:2 [ "identificador" => "sec0004" "titulo" => "Participants" ] 2 => array:3 [ "identificador" => "sec0005" "titulo" => "Procedures" "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0006" "titulo" => "Training protocols" ] 1 => array:2 [ "identificador" => "sec0007" "titulo" => "Vertical jump" ] 2 => array:2 [ "identificador" => "sec0008" "titulo" => "Aerobic capacity" ] ] ] 3 => array:2 [ "identificador" => "sec0009" "titulo" => "Statistical analysis" ] ] ] 4 => array:2 [ "identificador" => "sec0010" "titulo" => "Results" ] 5 => array:2 [ "identificador" => "sec0011" "titulo" => "Discussion" ] 6 => array:2 [ "identificador" => "sec0012" "titulo" => "Conclusion" ] 7 => array:2 [ "identificador" => "sec0013" "titulo" => "Practical applications" ] 8 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2023-02-09" "fechaAceptado" => "2023-04-17" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1834647" "palabras" => array:5 [ 0 => "COVID-19" 1 => "High intensity interval training" 2 => "Sprint interval training" 3 => "Team-sports" 4 => "Football" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:2 [ "titulo" => "Abstract" "resumen" => "This study aimed to compare the effects of two intervention programs (i.e., high-intensity interval training [ΗΙΙΤ] versus sprint interval training [SIT]) during the second wave of pandemic COVID-19 in semi-professional soccer players. Twenty-nine male soccer players were divided into two groups: HIIT (N: 16, age: 19.6 ± 2.4 years, height: 1.8 ± 0.5 m, weight: 71.5 ± 4.6 kg, and body fat: 7.3 ± 2.6%), who performed a HIIT protocol with progressive intensity and resistance training; SIT (N: 13, age: 23.5 ± 5.1 years, height: 1.8 ± 0.1 m, weight: 74.0 ± 4.5 kg and body fat: 8.8 ± 2.6%) that performed a SIT program combined with body weight circuit training. According to the instructions from World Health Organization of basic protective measures against COVID-19, each session did not exceed 60 min. Aerobic capacity (Yo–Yo IR1) and countermovement jump (CMJ) height were measured before and after a 4-week intervention period. Aerobic variables (maximum oxygen uptake [V̇O2max], velocity at V̇O2max [vV̇O2max] and CMJ significantly increased (p<0.001), while maximum heart rate [HRmax] decreased (p<0.01) following the HIIT intervention program. Conversely, values remained unchanged in the SIT group after the training. Post-evaluation between-group comparisons revealed that V̇O2max was significantly higher in HIIT when compared to SIT (p<0.05). These results suggest that HIIT combined with resistance training, in different sessions, could lead to superior improvements in endurance and vertical jump ability in short time periods when compared to the combination of SIT and body-weighted strength training in semi-professional soccer players." ] ] "multimedia" => array:4 [ 0 => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 880 "Ancho" => 1667 "Tamanyo" => 59066 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0001" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "Countermovement jump pre- and post-4-week program. ***Statistically significant difference (p<0.001) pre and post. HIIT: High-Intensity Interval Training; SIT: Sprint Interval Training." ] ] 1 => array:8 [ "identificador" => "tbl0001" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0002" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "HIIT: high-intensity interval training; SIT: sprint-interval training." "tablatextoimagen" => array:2 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0001"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th></tr><tr title="table-row"><a name="en0002"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Week \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0003"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">1st \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0004"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top" scope="col" style="border-bottom: 2px solid black">2nd</th><a name="en0005"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top" scope="col" style="border-bottom: 2px solid black">3rd</th><a name="en0006"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">4th \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0007"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Days \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0008"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">– \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0009"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">–</td><a name="en0010"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">1st \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0011"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2nd</td><a name="en0012"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">– \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0013"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Sets \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0014"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0015"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">4</td><a name="en0016"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0017"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">4</td><a name="en0018"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">4 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0019"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Duration \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0020"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">6 min \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0021"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">6 min</td><a name="en0022"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">4 min</td><a name="en0023"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">4 min \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0024"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Intensity \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0025"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">85% vV̇O2max \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0026"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">90% vV̇O2max</td><a name="en0027"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="center" valign="top">95% vV̇O2max</td><a name="en0028"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">100% vV̇O2max \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0029"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top" style="border-bottom: 2px solid black">Rest \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0030"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top" style="border-bottom: 2px solid black">3 min \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0031"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top" style="border-bottom: 2px solid black">3 min</td><a name="en0032"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="center" valign="top" style="border-bottom: 2px solid black">3 min</td><a name="en0033"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top" style="border-bottom: 2px solid black">3 min \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3563569.png" ] ] 1 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0034"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th></tr><tr title="table-row"><a name="en0035"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Week \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0036"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="7" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">4-week period</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0037"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Days \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0038"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">1st</td><a name="en0039"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">2nd</td><a name="en0040"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">3rd</td></tr><tr title="table-row"><a name="en0041"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Rounds \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0042"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">1</td><a name="en0043"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">2</td><a name="en0044"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2</td></tr><tr title="table-row"><a name="en0045"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Sets \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0046"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">10</td><a name="en0047"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">8</td><a name="en0048"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">3</td></tr><tr title="table-row"><a name="en0049"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Duration \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0050"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">10 s</td><a name="en0051"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">30 s</td><a name="en0052"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2 min</td></tr><tr title="table-row"><a name="en0053"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Intensity \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0054"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">95% vV̇O2max</td><a name="en0055"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">100% vV̇O2max</td><a name="en0056"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">105% vV̇O2max</td></tr><tr title="table-row"><a name="en0057"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">Rest \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0058"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">20 s</td><a name="en0059"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">30 s</td><a name="en0060"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2 min</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3563568.png" ] ] ] ] "descripcion" => array:1 [ "en" => "Prescription of the exercise protocols." ] ] 2 => array:8 [ "identificador" => "tbl0002" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0003" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0061"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup rowgroup " rowspan="2" align="left" valign="top" scope="col" colspan="2"></th><a name="en0062"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Weeks</th><a name="en0063"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup rowgroup " rowspan="2" align="center" valign="top" scope="col" colspan="2" style="border-bottom: 2px solid black">Total Time</th></tr><tr title="table-row"><a name="en0065"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">1st</th><a name="en0066"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">2nd</th><a name="en0067"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">3rd</th><a name="en0068"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">4th</th></tr><tr title="table-row"><a name="en0070"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Training items \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0071"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Time \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0072"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0073"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0074"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0075"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0076"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0077"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0078"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0079"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0080"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0081"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0082"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Warm-up \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0083"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">(min) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0084"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0085"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0086"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0087"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0088"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0089"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0090"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0091"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0092"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">200 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0093"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">200 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0094"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Interval training \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0095"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">(min) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0096"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">108 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0097"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">33 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0098"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">72 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0099"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">33 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0100"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">60 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0101"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">33 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0102"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">48 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0103"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">33 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0104"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">288 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0105"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">132<a class="elsevierStyleCrossRef" href="#tb2fn1">*</a> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0106"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Strength training \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0107"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">(min) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0108"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0109"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0110"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0111"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0112"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0113"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0114"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0115"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">120 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0116"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">480 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0117"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">480 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0118"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Cool-down \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0119"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">(min) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0120"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0121"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0122"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0123"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0124"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0125"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0126"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0127"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0128"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">200 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0129"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">200 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0130"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Total Time \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0131"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">(min) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0132"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">328 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0133"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">253 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0134"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">292 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0135"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">253 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0136"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">280 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0137"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">253 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0138"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">268 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0139"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">253 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0140"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1168 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0141"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1012 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0142"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead colgroup " colspan="2" align="left" valign="top">Number of sessions per week</td><a name="en0143"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0144"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0145"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0146"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0147"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0148"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0149"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0150"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0151"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">20 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0152"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">20 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3563567.png" ] ] ] "notaPie" => array:1 [ 0 => array:3 [ "identificador" => "tb2fn1" "etiqueta" => "⁎" "nota" => "Statistically significant difference (p<0.05) in total minutes of interval training between groups HIIT and SIT. HIIT: high-intensity interval training; SIT: sprint interval raining." ] ] ] "descripcion" => array:1 [ "en" => "Total training time during the 4-week program." ] ] 3 => array:8 [ "identificador" => "tbl0003" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0004" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0153"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_rowgroup " rowspan="3" align="left" valign="top" scope="col" style="border-bottom: 2px solid black"></th><a name="en0154"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">V̇O2max (ml−1 kg−1 min−1)</th><a name="en0155"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">vV̇O2max (km h−1)</th><a name="en0156"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Meters</th><a name="en0157"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HRmax (bpm)</th></tr><tr title="table-row"><a name="en0159"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0160"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0161"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0162"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0163"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0164"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0165"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0166"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th></tr><tr title="table-row"><a name="en0168"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0169"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0170"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0171"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0172"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0173"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0174"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0175"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0176"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0177"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0178"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0179"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0180"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0181"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0182"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0183"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0184"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Mean \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0185"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">54.88 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0186"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">59.74 <a class="elsevierStyleCrossRef" href="#tb3fn2">⁎⁎</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0187"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">56.50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0188"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">55.33<a class="elsevierStyleCrossRef" href="#tb3fn3">†</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0189"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16.65 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0190"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">18.19<a class="elsevierStyleCrossRef" href="#tb3fn2">⁎⁎</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0191"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">17.71 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0192"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">17.52<a class="elsevierStyleCrossRef" href="#tb3fn3">†</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0193"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">2200 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0194"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">2779<a class="elsevierStyleCrossRef" href="#tb3fn2">⁎⁎</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0195"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">2393 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0196"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">2254<a class="elsevierStyleCrossRef" href="#tb3fn3">†</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0197"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">194.69 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0198"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">191.06<a class="elsevierStyleCrossRef" href="#tb3fn1">*</a> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0199"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">193.38 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0200"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">192.92 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0201"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">SD \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0202"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.94 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0203"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.75 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0204"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.41 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0205"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.54 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0206"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.93 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0207"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.19 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0208"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.85 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0209"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.13 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0210"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">361 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0211"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">462 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0212"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">438 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0213"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">583 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0214"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6.50 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0215"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6.97 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0216"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">9.70 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0217"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">8.75 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3563566.png" ] ] ] "notaPie" => array:3 [ 0 => array:3 [ "identificador" => "tb3fn1" "etiqueta" => "⁎" "nota" => "Statistically significant difference (p<0.01) pre and post." ] 1 => array:3 [ "identificador" => "tb3fn2" "etiqueta" => "⁎⁎" "nota" => "Statistically significant difference (p<0.001) pre and post." ] 2 => array:3 [ "identificador" => "tb3fn3" "etiqueta" => "†" "nota" => "Statistically significant difference (p<0.05) in post between groups HIIT and SIT. HIIT: high-intensity interval training; SIT: sprint interval training; HRmax: maximum heart rate expressed bump per minute; SD: standard deviation; V̇O2max: maximum oxygen output expressed ml per body mass per minute; vV̇O2max: velocity of the maximum oxygen output expressed by kilometers per hour." ] ] ] "descripcion" => array:1 [ "en" => "Aerobic and maximum heart rate variables of YO-YO IR1 test at pre- and post-intervention program." ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec1" "bibliografiaReferencia" => array:27 [ 0 => array:3 [ "identificador" => "bib0001" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "How has COVID-19 modified training and mood in professional and non-professional football players?" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "D. Mon-López" 1 => "A. García-Aliaga" 2 => "A.G. Bartolomé" 3 => "D.M. Solana" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:3 [ "tituloSerie" => "Physiol Behav" "fecha" => "2020" "volumen" => "227" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0002" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Effects of the COVID-19 confinement period on physical conditions in young elite soccer players" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "M. Dauty" 1 => "P. Menu" 2 => "A. Fouasson-Chailloux" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.23736/S0022-4707.20.11669-4" "Revista" => array:7 [ "tituloSerie" => "J Sports Med Phys Fitness" "fecha" => "2020" "volumen" => "61" "numero" => "9" "paginaInicial" => "1252" "paginaFinal" => "1257" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33269885" "web" => "Medline" ] ] ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib0003" "etiqueta" => "3" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Reopening elite sport during the COVID-19 pandemic: experiences from a controlled return to elite football in Denmark" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "L. Pedersen" 1 => "J. Lindberg" 2 => "R.R. Lind" 3 => "H. Rasmusen" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1111/sms.13915" "Revista" => array:7 [ "tituloSerie" => "Scand J Med Sci Sports" "fecha" => "2021" "volumen" => "31" "numero" => "4" "paginaInicial" => "936" "paginaFinal" => "939" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33480037" "web" => "Medline" ] ] ] ] ] ] ] ] 3 => array:3 [ "identificador" => "bib0004" "etiqueta" => "4" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "COVID-19-related restrictions and quarantine COVID-19: effects on cardiovascular and yo-yo test performance in professional soccer players" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "Albuquerque Freire Ld" 1 => "M. Tannure" 2 => "M. Sampaio" 3 => "M. Slimani" 4 => "H. Znazen" 5 => "N.L. Bragazzi" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:3 [ "tituloSerie" => "Front Psychol" "fecha" => "2020" "volumen" => "11" ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib0005" "etiqueta" => "5" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Case report: return to sport following the COVID-19 lockdown and its impact on injury rates in the German soccer league" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "D.R. Seshadri" 1 => "M.L. Thom" 2 => "E.R. Harlow" 3 => "C.K. Drummond" 4 => "J.E. Voos" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:3 [ "tituloSerie" => "Front Sports Active Living" "fecha" => "2021" "volumen" => "3" ] ] ] ] ] ] 5 => array:3 [ "identificador" => "bib0006" "etiqueta" => "6" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Correction: García-Aliaga et al. comparative analysis of soccer performance intensity of the pre–post-lockdown COVID-19 in LaLiga™" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "A. García-Aliaga" 1 => "M. Marquina" 2 => "A. Cordón-Carmona" 3 => "M. Sillero-Quintana" 4 => "A. de la Rubia" 5 => "S.J. Vielcazat" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.3390/ijerph18073685" "Revista" => array:5 [ "tituloSerie" => "Int J Environ Res Public Health" "fecha" => "2021" "volumen" => "18" "paginaInicial" => "3685" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33916143" "web" => "Medline" ] ] ] ] ] ] ] ] 6 => array:3 [ "identificador" => "bib0007" "etiqueta" => "7" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Injuries during return to sport after the COVID-19 lockdown: an epidemiologic study of italian professional soccer players" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "D. Mazza" 1 => "A. Annibaldi" 2 => "G. Princi" 3 => "L. Arioli" 4 => "F. Marzilli" 5 => "E. Monaco" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:4 [ "tituloSerie" => "Orthop J Sports Med" "fecha" => "2022" "volumen" => "10" "numero" => "6" ] ] ] ] ] ] 7 => array:3 [ "identificador" => "bib0008" "etiqueta" => "8" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "LaLiga lockdown: conditioning strategy and adaptation to in-game regulations during COVID-19 pandemic prevented an increase in injury incidence" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "V. Moreno-Pérez" 1 => "J. Patricios" 2 => "N. Amigo de Bonet" 3 => "Buil MÁ" 4 => "J. Díaz de Alda" 5 => "A. Fernández-Posada" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.3390/ijerph19052920" "Revista" => array:6 [ "tituloSerie" => "Int J Environ Res Public Health" "fecha" => "2022" "volumen" => "19" "numero" => "5" "paginaInicial" => "2920" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/35270612" "web" => "Medline" ] ] ] ] ] ] ] ] 8 => array:3 [ "identificador" => "bib0009" "etiqueta" => "9" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Influence of the COVID-19 lockdown on Spanish professional soccer teams’ external demands according to their on-field ranking" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => "J. Raya-González" 1 => "T. García-Calvo" 2 => "A. Rubio-Morales" 3 => "R.L. Del Campo" 4 => "R. Resta" 5 => "J.C. Ponce-Bordón" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.5114/biolsport.2022.113294" "Revista" => array:7 [ "tituloSerie" => "Biol Sport" "fecha" => "2022" "volumen" => "39" "numero" => "4" "paginaInicial" => "1081" "paginaFinal" => "1086" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/36247957" "web" => "Medline" ] ] ] ] ] ] ] ] 9 => array:3 [ "identificador" => "bib0010" "etiqueta" => "10" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Injury rates following the COVID-19 lockdown: a case study from an UEFA futsal champions league finalist" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "K. Spyrou" 1 => "P.E. Alcaraz" 2 => "E. Marín-Cascales" 3 => "R. Herrero-Carrasco" 4 => "L.A. Pereira" 5 => "I. Loturco" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:4 [ "tituloSerie" => "Apunts Sports Med" "fecha" => "2022" "volumen" => "57" "numero" => "213" ] ] ] ] ] ] 10 => array:3 [ "identificador" => "bib0011" "etiqueta" => "11" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Effects of the COVID-19 lockdown on neuromuscular performance and body composition in elite futsal players" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "K. Spyrou" 1 => "P.E. Alcaraz" 2 => "E. Marín-Cascales" 3 => "R. Herrero-Carrasco" 4 => "D.D. Cohen" 5 => "J. Calleja-Gonzalez" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "J Strength Condition Res" "fecha" => "2021" "volumen" => "35" "numero" => "8" "paginaInicial" => "2309" "paginaFinal" => "2315" ] ] ] ] ] ] 11 => array:3 [ "identificador" => "bib0012" "etiqueta" => "12" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Influence of the COVID-19 lockdown and restart on the injury incidence and injury burden in men's professional football leagues in 2020: the UEFA Elite Club Injury Study" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "M. Waldén" 1 => "J. Ekstrand" 2 => "M. Hägglund" 3 => "A. McCall" 4 => "M. Davison" 5 => "A. Hallén" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1186/s40798-022-00457-4" "Revista" => array:6 [ "tituloSerie" => "Sports Med-Open" "fecha" => "2022" "volumen" => "8" "numero" => "1" "paginaInicial" => "67" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/35552918" "web" => "Medline" ] ] ] ] ] ] ] ] 12 => array:3 [ "identificador" => "bib0013" "etiqueta" => "13" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Coronavirus disease-19 quarantine is more detrimental than traditional off-season on physical conditioning of professional soccer players" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "R. Grazioli" 1 => "I. Loturco" 2 => "B.M. Baroni" 3 => "G.S. Oliveira" 4 => "V. Saciura" 5 => "E. Vanoni" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "J Strength Condition Res" "fecha" => "2020" "volumen" => "34" "numero" => "12" "paginaInicial" => "3316" "paginaFinal" => "3320" ] ] ] ] ] ] 13 => array:3 [ "identificador" => "bib0014" "etiqueta" => "14" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Detraining of specific neuromuscular qualities in elite footballers during COVID-19 quarantine" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "D.D. Cohen" 1 => "A. Restrepo" 2 => "C. Richter" 3 => "J.R. Harry" 4 => "M.V. Franchi" 5 => "C. Restrepo" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Sci Med Football" "fecha" => "2021" "volumen" => "5" "numero" => "1" "paginaInicial" => "26" "paginaFinal" => "31" ] ] ] ] ] ] 14 => array:3 [ "identificador" => "bib0015" "etiqueta" => "15" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A simple method for measurement of mechanical power jumping" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "C. Bosco" 1 => "P Luhtanen" 2 => "P.V. komi" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:4 [ "tituloSerie" => "Eur J Appl Physiol" "fecha" => "1983" "paginaInicial" => "273" "paginaFinal" => "282" ] ] ] ] ] ] 15 => array:3 [ "identificador" => "bib0016" "etiqueta" => "16" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The Yo-Yo intermittent recovery test: a useful tool for evaluation of physical performance in intermittent sports" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "J. Bangsbo" 1 => "F.M. Iaia" 2 => "P. Krustrup" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.2165/00007256-200838010-00004" "Revista" => array:6 [ "tituloSerie" => "Sports Med" "fecha" => "2008" "volumen" => "38" "paginaInicial" => "37" "paginaFinal" => "51" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18081366" "web" => "Medline" ] ] ] ] ] ] ] ] 16 => array:3 [ "identificador" => "bib0017" "etiqueta" => "17" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Gross energy cost of horizontal treadmill and track running" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "L. Léger" 1 => "D. Mercier" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.2165/00007256-198401040-00003" "Revista" => array:6 [ "tituloSerie" => "Sports Med" "fecha" => "1984" "volumen" => "1" "paginaInicial" => "270" "paginaFinal" => "277" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/6390604" "web" => "Medline" ] ] ] ] ] ] ] ] 17 => array:3 [ "identificador" => "bib0018" "etiqueta" => "18" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Making meaningful inferences about magnitudes" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "A.M. Batterham" 1 => "W.G. Hopkins" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:7 [ "tituloSerie" => "Int J Sports Physiol Perform" "fecha" => "2006" "volumen" => "1" "numero" => "1" "paginaInicial" => "50" "paginaFinal" => "57" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19114737" "web" => "Medline" ] ] ] ] ] ] ] ] 18 => array:3 [ "identificador" => "bib0019" "etiqueta" => "19" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Endurance and strength training for soccer players: physiological considerations" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "J. Hoff" 1 => "J. Helgerud" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.2165/00007256-200434030-00003" "Revista" => array:6 [ "tituloSerie" => "Sports Med" "fecha" => "2004" "volumen" => "34" "paginaInicial" => "165" "paginaFinal" => "180" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/14987126" "web" => "Medline" ] ] ] ] ] ] ] ] 19 => array:3 [ "identificador" => "bib0020" "etiqueta" => "20" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Reduced volume and increased training intensity elevate muscle Na+-K+ pump α2-subunit expression as well as short-and long-term work capacity in humans" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "J. Bangsbo" 1 => "T.P. Gunnarsson" 2 => "J. Wendell" 3 => "L. Nybo" 4 => "M. Thomassen" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1152/japplphysiol.00358.2009" "Revista" => array:7 [ "tituloSerie" => "J Appl Physiol" "fecha" => "2009" "volumen" => "107" "numero" => "6" "paginaInicial" => "1771" "paginaFinal" => "1780" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19797693" "web" => "Medline" ] ] ] ] ] ] ] ] 20 => array:3 [ "identificador" => "bib0021" "etiqueta" => "21" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Training and testing the elite athlete" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "J. Bangsbo" 1 => "M. Mohr" 2 => "A. Poulsen" 3 => "J. Perez-Gomez" 4 => "P. Krustrup" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "J Exerc Sci Fit" "fecha" => "2006" "volumen" => "4" "numero" => "1" "paginaInicial" => "1" "paginaFinal" => "14" ] ] ] ] ] ] 21 => array:3 [ "identificador" => "bib0022" "etiqueta" => "22" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Aerobic high-intensity intervals improve V˙ O2max more than moderate training" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "J. Helgerud" 1 => "K. Høydal" 2 => "E. Wang" 3 => "T. Karlsen" 4 => "P. Berg" 5 => "M. Bjerkaas" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Med Sci Sports Exercise" "fecha" => "2007" "volumen" => "39" "numero" => "4" "paginaInicial" => "665" "paginaFinal" => "671" ] ] ] ] ] ] 22 => array:3 [ "identificador" => "bib0023" "etiqueta" => "23" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "High-intensity interval training, solutions to the programming puzzle: part I: cardiopulmonary emphasis" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "M. Buchheit" 1 => "P.B. Laursen" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1007/s40279-013-0029-x" "Revista" => array:7 [ "tituloSerie" => "Sports Med" "fecha" => "2013" "volumen" => "43" "numero" => "5" "paginaInicial" => "313" "paginaFinal" => "338" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23539308" "web" => "Medline" ] ] ] ] ] ] ] ] 23 => array:3 [ "identificador" => "bib0024" "etiqueta" => "24" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Etiology and recovery of neuromuscular fatigue following simulated soccer match-play" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "K. Thomas" 1 => "J. Dent" 2 => "G. Howatson" 3 => "S. Goodall" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1249/MSS.0000000000001196" "Revista" => array:7 [ "tituloSerie" => "Med Sci Sports Exerc" "fecha" => "2017" "volumen" => "49" "numero" => "5" "paginaInicial" => "955" "paginaFinal" => "964" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28060035" "web" => "Medline" ] ] ] ] ] ] ] ] 24 => array:3 [ "identificador" => "bib0025" "etiqueta" => "25" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Concurrent training enhances athletes' strength, muscle endurance, and other measures" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "W.J. Davis" 1 => "D.T. Wood" 2 => "R.G. Andrews" 3 => "L.M. Elkind" 4 => "W.B. Davis" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "J Strength Condition Res" "fecha" => "2008" "volumen" => "22" "numero" => "5" "paginaInicial" => "1487" "paginaFinal" => "1502" ] ] ] ] ] ] 25 => array:3 [ "identificador" => "bib0026" "etiqueta" => "26" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Recovery in soccer: part I—post-match fatigue and time course of recovery" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => "M. Nédélec" 1 => "A. McCall" 2 => "C. Carling" 3 => "F. Legall" 4 => "S. Berthoin" 5 => "G. Dupont" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Sports Med" "fecha" => "2012" "volumen" => "42" "paginaInicial" => "997" "paginaFinal" => "1015" ] ] ] ] ] ] 26 => array:3 [ "identificador" => "bib0027" "etiqueta" => "27" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The neuromuscular, endocrine and mood responses to a single versus double training session day in soccer players" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "W. Sparkes" 1 => "A. Turner" 2 => "C.J. Cook" 3 => "M. Weston" 4 => "M. Russell" 5 => "M. Johnston" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/j.jsams.2019.08.291" "Revista" => array:7 [ "tituloSerie" => "J Sci Med Sport" "fecha" => "2020" "volumen" => "23" "numero" => "1" "paginaInicial" => "69" "paginaFinal" => "74" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/31526664" "web" => "Medline" ] ] ] ] ] ] ] ] ] ] ] ] "agradecimientos" => array:1 [ 0 => array:2 [ "identificador" => "xack750547" "vista" => "all" ] ] ] "idiomaDefecto" => "en" "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000135/v2_202406100409/en/main.assets" "Apartado" => array:4 [ "identificador" => "82823" "tipo" => "SECCION" "en" => array:2 [ "titulo" => "Original articles" "idiomaDefecto" => true ] "idiomaDefecto" => "en" ] "PDF" => "https://static.elsevier.es/multimedia/26665069/0000005800000218/v2_202406100409/S2666506923000135/v2_202406100409/en/main.pdf?idApp=UINPBA00004N&text.app=https://apunts.org/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000135?idApp=UINPBA00004N"]

Statistics

Original Article

Effects of high-intensity interval training versus sprint interval training during the second wave of COVID-19 lockdown on soccer players

Thomakos Pierrosa, Konstantinos Spyroub,c,

Corresponding author

kspyrou@ucam.edu

Corresponding author at: UCAM Research Center for High Performance Sport, UCAM Universidad Catόlica de Murcia, Murcia, Spain.

a School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Dafne, Greece

b UCAM Research Center for High Performance Sport, UCAM Universidad Catόlica de Murcia, Murcia, Spain

c Facultad de Deporte, UCAM Universidad Católica de Murcia, Murcia, Spain

Read

2698

Times
was read the article

1265

Total PDF

1433

Total HTML

Share statistics

 array:22 [
  "pii" => "S2666506923000135"
  "issn" => "26665069"
  "doi" => "10.1016/j.apunsm.2023.100414"
  "estado" => "S300"
  "fechaPublicacion" => "2023-04-01"
  "aid" => "100414"
  "copyright" => "CONSELL CATAL&#192; DE L&#39;ESPORT"
  "copyrightAnyo" => "2023"
  "documento" => "article"
  "crossmark" => 1
  "subdocumento" => "fla"
  "abierto" => array:3 [
    "ES" => false
    "ES2" => false
    "LATM" => false
  ]
  "gratuito" => false
  "lecturas" => array:1 [
    "total" => 0
  ]
  "itemSiguiente" => array:17 [
    "pii" => "S2666506923000123"
    "issn" => "26665069"
    "doi" => "10.1016/j.apunsm.2023.100413"
    "estado" => "S300"
    "fechaPublicacion" => "2023-04-01"
    "aid" => "100413"
    "copyright" => "CONSELL CATAL&#192; DE L&#39;ESPORT"
    "documento" => "article"
    "crossmark" => 1
    "subdocumento" => "fla"
    "abierto" => array:3 [
      "ES" => false
      "ES2" => false
      "LATM" => false
    ]
    "gratuito" => false
    "lecturas" => array:1 [
      "total" => 0
    ]
    "en" => array:11 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Special article</span>"
      "titulo" => "Physical performance preparation for the cerebral palsy football world cup&#58; A team study"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => "en"
      "contieneResumen" => array:1 [
        "en" => true
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "resumenGrafico" => array:2 [
        "original" => 0
        "multimedia" => array:8 [
          "identificador" => "fig0001"
          "etiqueta" => "Fig&#46; 1"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr1.jpeg"
              "Alto" => 1250
              "Ancho" => 3500
              "Tamanyo" => 179993
            ]
          ]
          "detalles" => array:1 [
            0 => array:3 [
              "identificador" => "alt0001"
              "detalle" => "Fig "
              "rol" => "short"
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">Preparation period for the 2022 IFCPF World Cup&#44; including the dates of TC and training programs between them&#46; Mar&#58; March&#59; Jun&#58; June&#59; Oct&#58; October&#59; Feb&#58; February&#59; Apr&#58; April&#59; TC&#58; training camp&#59; IFCPF&#58; International Federation of Cerebral Palsy Football&#59; FT&#58; football trainings&#59; ST&#58; strength training&#59; HIIT&#58; high-intensity interval training&#59; RT&#58; resistance training&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "Iv&#225;n Pe&#241;a-Gonz&#225;lez, Manuel Moya-Ram&#243;n"
          "autores" => array:2 [
            0 => array:2 [
              "nombre" => "Iv&#225;n"
              "apellidos" => "Pe&#241;a-Gonz&#225;lez"
            ]
            1 => array:2 [
              "nombre" => "Manuel"
              "apellidos" => "Moya-Ram&#243;n"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000123?idApp=UINPBA00004N"
    "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000123/v2_202406100409/en/main.assets"
  ]
  "itemAnterior" => array:17 [
    "pii" => "S2666506923000111"
    "issn" => "26665069"
    "doi" => "10.1016/j.apunsm.2023.100412"
    "estado" => "S300"
    "fechaPublicacion" => "2023-04-01"
    "aid" => "100412"
    "copyright" => "CONSELL CATAL&#192; DE L&#39;ESPORT"
    "documento" => "article"
    "crossmark" => 1
    "subdocumento" => "fla"
    "abierto" => array:3 [
      "ES" => false
      "ES2" => false
      "LATM" => false
    ]
    "gratuito" => false
    "lecturas" => array:1 [
      "total" => 0
    ]
    "en" => array:11 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
      "titulo" => "Successful outcomes after surgical treatment of chronic complete proximal hamstring avulsions in female athletes older than 55 years"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => "en"
      "contieneResumen" => array:1 [
        "en" => true
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "resumenGrafico" => array:2 [
        "original" => 0
        "multimedia" => array:8 [
          "identificador" => "fig0003"
          "etiqueta" => "Fig&#46; 3"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr3.jpeg"
              "Alto" => 1889
              "Ancho" => 3350
              "Tamanyo" => 499693
            ]
          ]
          "detalles" => array:1 [
            0 => array:3 [
              "identificador" => "alt0003"
              "detalle" => "Fig "
              "rol" => "short"
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spara003" class="elsevierStyleSimplePara elsevierViewall">Release of the stump&#46; The sciatic nerve is seen attached to the myotendinous junction &#40;star&#41;&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "Alejandro Salido, Rosa L&#243;pez-Vidriero, Rafael Fern&#225;ndez Arteaga, Manuel Halc&#243;n, Emilio L&#243;pez-Vidriero"
          "autores" => array:5 [
            0 => array:2 [
              "nombre" => "Alejandro"
              "apellidos" => "Salido"
            ]
            1 => array:2 [
              "nombre" => "Rosa"
              "apellidos" => "L&#243;pez-Vidriero"
            ]
            2 => array:2 [
              "nombre" => "Rafael Fern&#225;ndez"
              "apellidos" => "Arteaga"
            ]
            3 => array:2 [
              "nombre" => "Manuel"
              "apellidos" => "Halc&#243;n"
            ]
            4 => array:2 [
              "nombre" => "Emilio"
              "apellidos" => "L&#243;pez-Vidriero"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000111?idApp=UINPBA00004N"
    "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000111/v2_202406100409/en/main.assets"
  ]
  "en" => array:18 [
    "idiomaDefecto" => true
    "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
    "titulo" => "Effects of high-intensity interval training versus sprint interval training during the second wave of COVID-19 lockdown on soccer players"
    "tieneTextoCompleto" => true
    "autores" => array:1 [
      0 => array:4 [
        "autoresLista" => "Thomakos Pierros, Konstantinos Spyrou"
        "autores" => array:2 [
          0 => array:3 [
            "nombre" => "Thomakos"
            "apellidos" => "Pierros"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0001"
              ]
            ]
          ]
          1 => array:4 [
            "nombre" => "Konstantinos"
            "apellidos" => "Spyrou"
            "email" => array:1 [
              0 => "kspyrou@ucam.edu"
            ]
            "referencia" => array:3 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">b</span>"
                "identificador" => "aff0002"
              ]
              1 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">c</span>"
                "identificador" => "aff0003"
              ]
              2 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">&#42;</span>"
                "identificador" => "cor0001"
              ]
            ]
          ]
        ]
        "afiliaciones" => array:3 [
          0 => array:3 [
            "entidad" => "School of Physical Education and Sports Science&#44; National and Kapodistrian University of Athens&#44; 17237 Dafne&#44; Greece"
            "etiqueta" => "a"
            "identificador" => "aff0001"
          ]
          1 => array:3 [
            "entidad" => "UCAM Research Center for High Performance Sport&#44; UCAM Universidad Cat&#972;lica de Murcia&#44; Murcia&#44; Spain"
            "etiqueta" => "b"
            "identificador" => "aff0002"
          ]
          2 => array:3 [
            "entidad" => "Facultad de Deporte&#44; UCAM Universidad Cat&#243;lica de Murcia&#44; Murcia&#44; Spain"
            "etiqueta" => "c"
            "identificador" => "aff0003"
          ]
        ]
        "correspondencia" => array:1 [
          0 => array:3 [
            "identificador" => "cor0001"
            "etiqueta" => "&#8270;"
            "correspondencia" => "Corresponding author at&#58; UCAM Research Center for High Performance Sport&#44; UCAM Universidad Cat&#972;lica de Murcia&#44; Murcia&#44; Spain&#46;"
          ]
        ]
      ]
    ]
    "resumenGrafico" => array:2 [
      "original" => 0
      "multimedia" => array:8 [
        "identificador" => "fig0001"
        "etiqueta" => "Fig&#46; 1"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr1.jpeg"
            "Alto" => 880
            "Ancho" => 1667
            "Tamanyo" => 59066
          ]
        ]
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "alt0001"
            "detalle" => "Fig "
            "rol" => "short"
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">Countermovement jump pre- and post-4-week program&#46; &#42;&#42;&#42;Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#41; pre and post&#46; HIIT&#58; High-Intensity Interval Training&#59; SIT&#58; Sprint Interval Training&#46;</p>"
        ]
      ]
    ]
    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0001" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0003">Introduction</span><p id="para0001" class="elsevierStylePara elsevierViewall">These last years&#44; due to the COVID-19&#44; sport leagues&#44; tournaments&#44; and athlete&#180;s regulations changed worldwide&#46;<a class="elsevierStyleCrossRef" href="#bib0001"><span class="elsevierStyleSup">1</span></a> During the COVID-19 era&#44; players&#8217; training and game schedule&#44; physical performance&#44; nutrition&#44; and sleep habits were affected&#46;<a class="elsevierStyleCrossRef" href="#bib0002"><span class="elsevierStyleSup">2</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0003"><span class="elsevierStyleSup">3</span></a> The easy transmission of the virus prompted sports authorities to take restrictive measures for athletes who were infected&#46; For example&#44; soccer players were forced into quarantine lasting from 15 days &#40;during the first months&#44; June &#8211; November 2020&#44; following the obligatory lockdown&#41; until 3 days &#40;December 2021&#8211; February 2022&#41;&#44; in case that athlete&#180;s condition was adequate&#46; Specifically&#44; in the second wave of the pandemic &#40;early November 2020&#8211; January 2021&#41;&#44; Super League &#40;1st Division of Greece&#41;&#44; 2nd&#44; 3rd Division of Greece&#44; and regional leagues were interrupted after the 3rd fixture&#46; The authorities proceeded to a training restriction on 7&#47;11&#47;2020 setting for a possible re-start of the league in January 2021&#46;</p><p id="para0002" class="elsevierStylePara elsevierViewall">During the first lockdown &#40;i&#46;e&#46;&#44; end of February 2020 &#8211; May 2020&#41;&#44; home-based training programs and nutritional instructions were provided to soccer players in order to maintain fitness levels for the re-start of competition&#46;<a class="elsevierStyleCrossRefs" href="#bib0002"><span class="elsevierStyleSup">2-5</span></a> However&#44; several studies demonstrated that such strategies were not as effective as expected since declines in physical performance and more injuries were reported in different team-sports&#46;<a class="elsevierStyleCrossRefs" href="#bib0006"><span class="elsevierStyleSup">6-12</span></a> For example&#44; a study with professional Brazilian soccer players revealed significant decreases in countermovement jump &#40;CMJ&#41; and sprint &#40;i&#46;e&#46;&#44; 10 and 20&#8239;m&#41; performances after the quarantine&#46;<a class="elsevierStyleCrossRef" href="#bib0013"><span class="elsevierStyleSup">13</span></a> Similarly&#44; another study<a class="elsevierStyleCrossRef" href="#bib0014"><span class="elsevierStyleSup">14</span></a> demonstrated that elite soccer players&#44; despite being able to maintain CMJ height&#44; significantly declined in metrics such as reactive strength index&#44; and peak concentric and eccentric power during the lockdown&#46; However&#44; additional research in neuromuscular and physiological components is still needed to better understand the effects of different high intensity programs applied during the second wave of COVID-19 quarantine through the course of the competitive season as most of the studies used moderate load training regimes&#46;</p><p id="para0003" class="elsevierStylePara elsevierViewall">The purpose of this study was to compare two 4-week intervention programs&#44; high-intensity interval training &#40;HIIT&#41; and sprint interval training &#40;SIT&#41; applied during the second wave of COVID-19&#44; in aerobic capacity and jumping ability in semi-professional soccer players&#46; It was hypothesized that endurance and neuromuscular capacity would improve for both groups &#40;i&#46;e&#46;&#44; HIIT and SIT&#41;&#46;</p></span><span id="sec0002" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0004">Material and methods</span><span id="sec0003" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0005">Study design</span><p id="para0004" class="elsevierStylePara elsevierViewall">An experimental study was designed to compare two intervention programs of 4 weeks&#44; in aerobic &#40;i&#46;e&#46;&#44; YO &#8211; YO Intermittent Recovery &#91;IR&#93; 1&#41; and jumping capacity &#40;i&#46;e&#46;&#44; CMJ height&#41;&#46; All participants were familiar with the performance evaluations as they regularly completed them every season&#46; Because of the COVID-19 pandemic&#44; Greek professional and semi-professional leagues were interrupted after the 3rd fixture &#40;November 2020&#41; until March 2021&#46; During the intermission&#44; two different intervention programs were implemented &#40;i&#46;e&#46;&#44; HIIT and SIT&#41;&#46; In the 1st week&#44; players realized a COVID-19 rapid test&#44; and after negative results they proceeded to the measurements&#46; Body composition and anthropometric measurements were completed in the morning &#40;08&#58;00 a&#46;m&#46;&#41;&#44; while the vertical jump and endurance field test were performed in the afternoon &#40;16&#58;30 p&#46;m&#46;&#41;&#46; In the 5th week &#40;i&#46;e&#46;&#44; after the 4-week intervention period&#41;&#44; players repeated the measurements&#44; in the same way&#44; order&#44; and with the same researchers&#46; Players who contracted the virus or got injured during the lockdown were excluded from the study&#46;</p></span><span id="sec0004" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0006">Participants</span><p id="para0005" class="elsevierStylePara elsevierViewall">Twenty-nine semi-professional soccer players of two teams participated&#46; Sixteen of them &#40;age&#58; 19&#46;6&#8239;&#177;&#8239;2&#46;4 years&#44; height&#58; 1&#46;8&#8239;&#177;&#8239;0&#46;5&#8239;m&#44; weight&#58; 71&#46;5&#8239;&#177;&#8239;4&#46;6&#8239;kg and body fat&#58; 7&#46;3&#8239;&#177;&#8239;2&#46;6&#37;&#41; were in the HII&#932; group and competed in 3rd National Division of Greece&#44; while the other thirteen &#40;age&#58; 23&#46;5&#8239;&#177;&#8239;5&#46;1 years&#44; height&#58; 1&#46;8&#8239;&#177;&#8239;0&#46;1&#8239;m&#44; weight&#58; 74&#46;0&#8239;&#177;&#8239;4&#46;5&#8239;kg and body fat&#58; 8&#46;8&#8239;&#177;&#8239;2&#46;6&#37;&#41; were in SIT group and competed 4th Division of Greece&#46; All players were healthy&#44; do not have any injury&#44; and did not receive any medication or illegal nutritional supplements&#46; All procedures were in accordance with the Declaration of Helsinki of 1975&#44; as revised in 2000 and approved by the university ethics committee&#44; while all participants signed a written informed consent before entering in the research procedure&#46;</p></span><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0007">Procedures</span><span id="sec0006" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0008">Training protocols</span><p id="para0006" class="elsevierStylePara elsevierViewall">HII&#932; group performed 3 running-based sessions without a ball per week and 2 weekly strength training workouts using free weights&#46; In the 1st week&#44; the aerobic training was prescribed as follows&#58; 6 sets of 6&#8239;min at 85&#37; of vV&#775;O<span class="elsevierStyleInf">2max</span>&#46; The 2nd week consisted of 4 sets of 6&#8239;min at 90&#37; of vV&#775;O<span class="elsevierStyleInf">2max</span> and the 3rd week contemplated two sessions in which players performed 5 sets of 4&#8239;min and a third session of 4 sets of 4&#8239;min at 95&#37; of vV&#775;O<span class="elsevierStyleInf">2max</span>&#46; Finally&#44; in the last week&#44; 4 sets of 4&#8239;min at 100&#37; of vV&#775;O<span class="elsevierStyleInf">2max</span> were completed in each session&#46; A 3&#8239;min recovery between sets was prescribed &#40;<a class="elsevierStyleCrossRef" href="#tbl0001">Table 1</a>&#41;&#46; Strength training consisted of bench press&#44; half-squat&#44; clean&#44; hip-trust&#44; leg flexion and extension &#40;i&#46;e&#46;&#44; 3&#8211;5 sets with 3&#8211;8 repetitions&#41;&#44; with 1&#8239;min rest between sets for each exercise and with 3&#8239;min rest between exercises and intensity from 65 to 95&#37; of 1RM was prescribed&#46;</p><elsevierMultimedia ident="tbl0001"></elsevierMultimedia><p id="para0007" class="elsevierStylePara elsevierViewall">SIT group completed 3 running-based sessions per week&#44; without a ball&#44; and 2 body weight circuit training sessions a week&#46; Players performed in the 1st training&#44; 1 round with 10 sets with 10&#8239;s running at 95&#37; vV&#775;O<span class="elsevierStyleInf">2max</span> and 20&#8239;s rest&#46; In the 2nd training&#44; 2 rounds of 8 sets with 30&#8239;s running at 100&#37; vV&#775;O<span class="elsevierStyleInf">2max</span> and 30&#8239;s rest&#46; Lastly&#44; in the 3rd training contained 2 rounds with 3 sets of 2&#8239;min running at 105&#37; vV&#775;O<span class="elsevierStyleInf">2max</span> and 2&#8239;min rest&#46; This program repeated every week with total running duration 33&#8239;min &#40;<a class="elsevierStyleCrossRef" href="#tbl0001">Table 1</a>&#41;&#46; The strength training program was the same during the 4 weeks and consisted of push-ups&#44; squats&#44; TRX row&#44; dumbbell row&#44; jumping jack&#44; mountain climbers four sets with 30&#8239;s work and 30&#8239;s rest for all exercises and 3&#8239;min rest between sets&#46;</p></span><span id="sec0007" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0009">Vertical jump</span><p id="para0008" class="elsevierStylePara elsevierViewall">CMJ performed on an electronic contact mat &#40;CHRONOJUMP &#8211; Bosco system&#44; Din-A4 297&#8239;&#215;&#8239;210&#8239;m&#44; Spain&#41;&#46; Players were instructed to perform a downward movement until 90&#176; knee flexion followed by a complete extension of the lower limbs with the hands fixed on the hips during the entire movement&#46; Three separate jumps on the platform with the aim of achieving maximal jump height&#44; with 30&#8239;s of recovery between jumps were allowed&#46; The highest of the 3 jumps was selected as measured by flight time calculations&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">15</span></a></p></span><span id="sec0008" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0010">Aerobic capacity</span><p id="para0009" class="elsevierStylePara elsevierViewall">The YO-YO IR 1 used to evaluate aerobic capacity&#46; The test consisted of repeated 2&#8239;&#215;&#8239;20&#8239;m runs back and forth between the starting&#44; turning&#44; and finishing line at a progressively increased speed controlled by audio beeps from a CD computer with speakers&#46; Between each running bout&#44; the subjects had a 10&#8239;s active rest period&#44; consisting of 2&#8239;&#215;&#8239;5&#8239;m of jogging&#46; The test ended when the subjects failed twice to reach the finishing line within the available time and the total distance covered was recorded&#46; V&#775;O<span class="elsevierStyleInf">2max</span> was then derived from Bangsbo&#180;s equation&#46;<a class="elsevierStyleCrossRef" href="#bib0016"><span class="elsevierStyleSup">16</span></a> The speed of V&#775;O<span class="elsevierStyleInf">2max</span> &#40;vV&#775;O<span class="elsevierStyleInf">2max</span>&#41; was estimated from previously published equations&#46;<a class="elsevierStyleCrossRef" href="#bib0017"><span class="elsevierStyleSup">17</span></a> Heart rate &#40;HR&#41; was recorded for each player every 5&#8239;s using a monitor with belt wireless strapped around the chest &#40;Suunto Team POD&#44; Dual Comfort Belt&#44; Finland&#41;&#46;</p></span></span><span id="sec0009" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0011">Statistical analysis</span><p id="para0010" class="elsevierStylePara elsevierViewall">&#932;he statistical analysis was performed with the STATISTICA software &#40;Version 12&#44; USA&#41;&#46; A two-way ANOVA with repeated measures pre- and post-COVID-19 restriction of two groups was used&#46; If a significant interaction was found&#44; post-hoc was performed and an Unequal N HSD <span class="elsevierStyleItalic">t</span>-test analysis was used&#46; Cohen&#39;s effect sizes &#40;ESs&#41; with 95&#37; confidence intervals &#40;95&#37; CI&#41; were computed to determine the magnitude of every paired comparison and classified as&#58; trivial &#40;&#60;0&#46;2&#41;&#44; small &#40;&#62;0&#46;2&#8211;0&#46;6&#41;&#44; moderate &#40;&#62;0&#46;6&#8211;1&#46;2&#41;&#44; large &#40;&#62;1&#46;2&#8211;2&#46;0&#41;&#44; and very large &#40;&#62;2&#46;0&#8211;4&#46;0&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0018"><span class="elsevierStyleSup">18</span></a> The level of significance was set at <span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#46;</p></span></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0012">Results</span><p id="para0011" class="elsevierStylePara elsevierViewall">All data are presented as mean and standard deviation &#40;SD&#41;&#46; Significant differences &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41; were found in total training time in HII&#932; when compared to SIT &#40;<a class="elsevierStyleCrossRef" href="#tbl0002">Table 2</a>&#41;&#46; No significant differences were found between the two groups &#40;HIIT versus SIT&#41; in body fat&#44; height&#44; and weight &#40;<span class="elsevierStyleItalic">p</span>&#62;0&#46;05&#41;&#44; however&#44; HIIT group were significant younger than SIT group &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41;&#46; No significant differences were observed in pre-COVID-19 evaluations between groups&#46; Following the 4-week program&#44; the HIIT group covered a significantly greater distance in YO-YO IR1 &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#59; ES&#58; 2&#46;7&#59; 95&#37; CI&#58; 3&#46;7 &#8211; 1&#46;6&#41;&#44; while achieving higher V&#775;O<span class="elsevierStyleInf">2max</span> &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#59; ES&#58; 2&#46;7&#59; 95&#37; CI&#58; 3&#46;7 &#8211; 1&#46;6&#41;&#44; vV&#775;O<span class="elsevierStyleInf">2max</span> &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#59; ES&#58; 2&#46;7&#59; 95&#37; CI&#58; 3&#46;7 &#8211; 1&#46;6&#41;&#44; CMJ height &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#59; ES&#58; 1&#46;6&#59; 95&#37; CI&#58; 2&#46;3 &#8211; 0&#46;8&#41;&#44; and lower value of HRmax &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;01&#59; ES&#58; 0&#46;8&#59; 95&#37; CI&#58; 0&#46;2 &#8211; 0&#46;8&#41; when compared to the baseline &#40;<a class="elsevierStyleCrossRef" href="#fig0001">Fig&#46; 1</a> and <a class="elsevierStyleCrossRef" href="#tbl0003">Table 3</a>&#41;&#46; Considering post measurements between group differences&#44; greater &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41; distance covered&#44; V&#775;O<span class="elsevierStyleInf">2max</span> and vV&#775;O<span class="elsevierStyleInf">2max</span> were found in HII&#932; group when compared to SI&#932; &#40;<a class="elsevierStyleCrossRef" href="#tbl0003">Table 3</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0002"></elsevierMultimedia><elsevierMultimedia ident="fig0001"></elsevierMultimedia><elsevierMultimedia ident="tbl0003"></elsevierMultimedia></span><span id="sec0011" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0013">Discussion</span><p id="para0012" class="elsevierStylePara elsevierViewall">The aim of the present 4-week study was to evaluate the effects of two training programs &#40;HIIT versus SIT&#41; on the performance of semi-professional soccer players during the 2nd wave of COVID-19&#46; The main results were the following&#58; 1&#41; significant pre-post improvements were found in the HIIT group for YO-YO IR 1 total distance&#44; V&#775;O<span class="elsevierStyleInf">2max</span>&#44; vV&#775;O<span class="elsevierStyleInf">2max</span>&#44; CMJ height&#44; and HRmax following the 4-week intervention&#59; 2&#41; non-significant differences were obtained in the same variables for the SIT group&#59; and 3&#41; the HIIT protocol yielded superior adaptations as seen by the significant differences found in YO-YO IR1 variables at post-test when compared to SIT&#46;</p><p id="para0013" class="elsevierStylePara elsevierViewall">Regarding endurance capacity&#44; significant pre-post improvements were found in the HIIT group for YO-YO IR 1 total distance&#44; V&#775;O<span class="elsevierStyleInf">2max</span>&#44; vV&#775;O<span class="elsevierStyleInf">2max</span>&#44; and HRmax following the 4-week intervention&#46; To author&#180;s knowledge&#44; this is the first study to research about the high-intensity training regimen during COVID-19 restriction&#46; These results could be explained by the intensity &#40;i&#46;e&#46;&#44; vVO<span class="elsevierStyleInf">2max</span>&#41;&#44; as higher velocity than V&#775;O<span class="elsevierStyleInf">2max</span>&#44; cardiac output and stroke volume reach lower values than at lower V&#775;O<span class="elsevierStyleInf">2max</span> velocity&#46;<a class="elsevierStyleCrossRef" href="#bib0019"><span class="elsevierStyleSup">19</span></a> Also&#44; the enzymatic adaptations related to anaerobic capacity&#44; training intensity should be near to maximum &#40;&#8764;90&#37; VO<span class="elsevierStyleInf">2max</span>&#41; and for this may explain the results obtained in the SIT group that remained unchanged&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">20</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0021"><span class="elsevierStyleSup">21</span></a> The findings of the present research are in line with the research of Helgerud et al&#46;&#44;<a class="elsevierStyleCrossRef" href="#bib0022"><span class="elsevierStyleSup">22</span></a> who applied HIIT and moderate-intensity continuous running programs for 4 weeks and found that HIIT significantly improved V&#775;O<span class="elsevierStyleInf">2max</span> when compared to moderate intensity running&#46; In the present study&#44; the duration of the SIT program was short and the maximum intensity exceeded vV&#775;O<span class="elsevierStyleInf">2max</span>&#44; with the result other cardiorespiratory and neuromuscular adaptations were involved<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">20</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0023"><span class="elsevierStyleSup">23</span></a>&#46; In applied settings&#44; intensities close to V&#775;O<span class="elsevierStyleInf">2max</span> may be better solution to improve the aerobic-anaerobic performance when compared to SIT program in a short-term period without competition in semi-professional soccer players&#46;</p><p id="para0014" class="elsevierStylePara elsevierViewall">Considering jumping ability&#44; no significant changes were observed in the SIT group while the HIIT group jumped higher after the 4-week training program &#40;despite the absence of between-group differences at post-test&#41;&#46; This could be explained&#44; at least in part&#44; by the fact that the resistance training and HIIT sessions were not performed in the same day and sufficient recovery was provided between the training sessions in order to avoid interference phenomenon&#46;<a class="elsevierStyleCrossRef" href="#bib0024"><span class="elsevierStyleSup">24</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">25</span></a> The difference between pre-season and the 4-week intervention period during in-season&#44; was the level of fatigue that players were exposed to&#44; as in the current study&#44; the 4-week period was not considered as preparation period&#44; because of the government&#39;s regulations &#40;maximum 1&#8239;h training exposure and individually training&#41; and lack of soccer-specific training schemes&#46; During the pre-season period in soccer&#44; there is high level of training stress&#44; with double training sessions&#44; and friendly matches&#46;<a class="elsevierStyleCrossRef" href="#bib0021"><span class="elsevierStyleSup">21</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0024"><span class="elsevierStyleSup">24</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0026"><span class="elsevierStyleSup">26</span></a><span class="elsevierStyleSup">&#44;</span><a class="elsevierStyleCrossRef" href="#bib0027"><span class="elsevierStyleSup">27</span></a> Lastly&#44; circuit body weight training could maintain the CMJ height&#44; however&#44; it did not present further improvements&#46;</p><p id="para0015" class="elsevierStylePara elsevierViewall">This study is limited by its design&#59; however&#44; it is important to highlight that subjects were part of soccer teams where each coaching staff decided the intervention program&#46; Furthermore&#44; no further information was registered&#44; such as the rating of perceive exertion or technology tracking system for the training session&#44; which could complement the load of the training&#46; More neuromuscular tests &#40;i&#46;e&#46;&#44; sprint&#44; change of direction&#44; and CMJ jump landing metrics&#41; is warranted in order to detect the effects of the 4 weeks break of competitive season because of second wave of COVID-19 lockdown&#46;</p></span><span id="sec0012" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0014">Conclusion</span><p id="para0016" class="elsevierStylePara elsevierViewall">In conclusion&#44; the present study demonstrated HIIT improved endurance and vertical jump height when compared to SIT&#46; Moreover&#44; intensities close to V&#775;O<span class="elsevierStyleInf">2max</span> may be a better solution to improve the aerobic performance when compared to SIT program in a short-term period without competition in semi-professional soccer players&#46;</p></span><span id="sec0013" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0015">Practical applications</span><p id="para0017" class="elsevierStylePara elsevierViewall">During the sudden interruption due to the spread and transmission of COVID-19 or in similar cases of detraining periods&#44; sports practitioners may use a similar intervention program to HIIT in order to improve the endurance and jumping capacity&#46; In addition&#44; the present study demonstrated that the SIT program was not effective in increasing endurance capacity in semi-professional soccer players in short-term preparation period&#46;</p></span></span>"
    "textoCompletoSecciones" => array:1 [
      "secciones" => array:9 [
        0 => array:3 [
          "identificador" => "xres2162606"
          "titulo" => "Abstract"
          "secciones" => array:1 [
            0 => array:1 [
              "identificador" => "abss0001"
            ]
          ]
        ]
        1 => array:2 [
          "identificador" => "xpalclavsec1834647"
          "titulo" => "Keywords"
        ]
        2 => array:2 [
          "identificador" => "sec0001"
          "titulo" => "Introduction"
        ]
        3 => array:3 [
          "identificador" => "sec0002"
          "titulo" => "Material and methods"
          "secciones" => array:4 [
            0 => array:2 [
              "identificador" => "sec0003"
              "titulo" => "Study design"
            ]
            1 => array:2 [
              "identificador" => "sec0004"
              "titulo" => "Participants"
            ]
            2 => array:3 [
              "identificador" => "sec0005"
              "titulo" => "Procedures"
              "secciones" => array:3 [
                0 => array:2 [
                  "identificador" => "sec0006"
                  "titulo" => "Training protocols"
                ]
                1 => array:2 [
                  "identificador" => "sec0007"
                  "titulo" => "Vertical jump"
                ]
                2 => array:2 [
                  "identificador" => "sec0008"
                  "titulo" => "Aerobic capacity"
                ]
              ]
            ]
            3 => array:2 [
              "identificador" => "sec0009"
              "titulo" => "Statistical analysis"
            ]
          ]
        ]
        4 => array:2 [
          "identificador" => "sec0010"
          "titulo" => "Results"
        ]
        5 => array:2 [
          "identificador" => "sec0011"
          "titulo" => "Discussion"
        ]
        6 => array:2 [
          "identificador" => "sec0012"
          "titulo" => "Conclusion"
        ]
        7 => array:2 [
          "identificador" => "sec0013"
          "titulo" => "Practical applications"
        ]
        8 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2023-02-09"
    "fechaAceptado" => "2023-04-17"
    "PalabrasClave" => array:1 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec1834647"
          "palabras" => array:5 [
            0 => "COVID-19"
            1 => "High intensity interval training"
            2 => "Sprint interval training"
            3 => "Team-sports"
            4 => "Football"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:1 [
      "en" => array:2 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abss0001" class="elsevierStyleSection elsevierViewall"><p id="spara006" class="elsevierStyleSimplePara elsevierViewall">This study aimed to compare the effects of two intervention programs &#40;i&#46;e&#46;&#44; high-intensity interval training &#91;&#919;&#921;&#921;&#932;&#93; versus sprint interval training &#91;SIT&#93;&#41; during the second wave of pandemic COVID-19 in semi-professional soccer players&#46; Twenty-nine male soccer players were divided into two groups&#58; HIIT &#40;N&#58; 16&#44; age&#58; 19&#46;6&#8239;&#177;&#8239;2&#46;4 years&#44; height&#58; 1&#46;8&#8239;&#177;&#8239;0&#46;5&#8239;m&#44; weight&#58; 71&#46;5&#8239;&#177;&#8239;4&#46;6&#8239;kg&#44; and body fat&#58; 7&#46;3&#8239;&#177;&#8239;2&#46;6&#37;&#41;&#44; who performed a HIIT protocol with progressive intensity and resistance training&#59; SIT &#40;N&#58; 13&#44; age&#58; 23&#46;5&#8239;&#177;&#8239;5&#46;1 years&#44; height&#58; 1&#46;8&#8239;&#177;&#8239;0&#46;1&#8239;m&#44; weight&#58; 74&#46;0&#8239;&#177;&#8239;4&#46;5&#8239;kg and body fat&#58; 8&#46;8&#8239;&#177;&#8239;2&#46;6&#37;&#41; that performed a SIT program combined with body weight circuit training&#46; According to the instructions from World Health Organization of basic protective measures against COVID-19&#44; each session did not exceed 60&#8239;min&#46; Aerobic capacity &#40;Yo&#8211;Yo IR1&#41; and countermovement jump &#40;CMJ&#41; height were measured before and after a 4-week intervention period&#46; Aerobic variables &#40;maximum oxygen uptake &#91;V&#775;O<span class="elsevierStyleInf">2max</span>&#93;&#44; velocity at V&#775;O<span class="elsevierStyleInf">2max</span> &#91;vV&#775;O<span class="elsevierStyleInf">2max</span>&#93; and CMJ significantly increased &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#41;&#44; while maximum heart rate &#91;HRmax&#93; decreased &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;01&#41; following the HIIT intervention program&#46; Conversely&#44; values remained unchanged in the SIT group after the training&#46; Post-evaluation between-group comparisons revealed that V&#775;O<span class="elsevierStyleInf">2max</span> was significantly higher in HIIT when compared to SIT &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41;&#46; These results suggest that HIIT combined with resistance training&#44; in different sessions&#44; could lead to superior improvements in endurance and vertical jump ability in short time periods when compared to the combination of SIT and body-weighted strength training in semi-professional soccer players&#46;</p></span>"
      ]
    ]
    "multimedia" => array:4 [
      0 => array:8 [
        "identificador" => "fig0001"
        "etiqueta" => "Fig&#46; 1"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr1.jpeg"
            "Alto" => 880
            "Ancho" => 1667
            "Tamanyo" => 59066
          ]
        ]
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "alt0001"
            "detalle" => "Fig "
            "rol" => "short"
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">Countermovement jump pre- and post-4-week program&#46; &#42;&#42;&#42;Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#41; pre and post&#46; HIIT&#58; High-Intensity Interval Training&#59; SIT&#58; Sprint Interval Training&#46;</p>"
        ]
      ]
      1 => array:8 [
        "identificador" => "tbl0001"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "alt0002"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:2 [
          "leyenda" => "<p id="spara003" class="elsevierStyleSimplePara elsevierViewall">HIIT&#58; high-intensity interval training&#59; SIT&#58; sprint-interval training&#46;</p>"
          "tablatextoimagen" => array:2 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0001"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th></tr><tr title="table-row"><a name="en0002"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">Week</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0003"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">1st&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0004"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top" scope="col" style="border-bottom: 2px solid black">2nd</th><a name="en0005"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top" scope="col" style="border-bottom: 2px solid black">3rd</th><a name="en0006"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">4th&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0007"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Days</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0008"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0009"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">&#8211;</td><a name="en0010"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">1st&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0011"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2nd</td><a name="en0012"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0013"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Sets</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0014"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0015"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">4</td><a name="en0016"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0017"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">4</td><a name="en0018"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0019"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Duration</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0020"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">6 min&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0021"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">6 min</td><a name="en0022"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">4 min</td><a name="en0023"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">4 min&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0024"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Intensity</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0025"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">85&#37; vV&#775;O2max&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0026"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">90&#37; vV&#775;O2max</td><a name="en0027"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="center" valign="top">95&#37; vV&#775;O2max</td><a name="en0028"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top">100&#37; vV&#775;O2max&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0029"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top" style="border-bottom: 2px solid black"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Rest</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0030"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top" style="border-bottom: 2px solid black">3 min&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0031"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top" style="border-bottom: 2px solid black">3 min</td><a name="en0032"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="center" valign="top" style="border-bottom: 2px solid black">3 min</td><a name="en0033"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="top" style="border-bottom: 2px solid black">3 min&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab3563569.png"
              ]
            ]
            1 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0034"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th></tr><tr title="table-row"><a name="en0035"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">Week</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0036"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="7" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">4-week period</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0037"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Days</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0038"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">1st</td><a name="en0039"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">2nd</td><a name="en0040"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">3rd</td></tr><tr title="table-row"><a name="en0041"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Rounds</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0042"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">1</td><a name="en0043"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">2</td><a name="en0044"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2</td></tr><tr title="table-row"><a name="en0045"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Sets</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0046"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">10</td><a name="en0047"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">8</td><a name="en0048"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">3</td></tr><tr title="table-row"><a name="en0049"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Duration</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0050"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">10 s</td><a name="en0051"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">30 s</td><a name="en0052"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2 min</td></tr><tr title="table-row"><a name="en0053"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Intensity</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0054"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">95&#37; vV&#775;O2max</td><a name="en0055"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">100&#37; vV&#775;O2max</td><a name="en0056"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">105&#37; vV&#775;O2max</td></tr><tr title="table-row"><a name="en0057"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">Rest</span></span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0058"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">20 s</td><a name="en0059"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="3" align="left" valign="top">30 s</td><a name="en0060"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="left" valign="top">2 min</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab3563568.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara002" class="elsevierStyleSimplePara elsevierViewall">Prescription of the exercise protocols&#46;</p>"
        ]
      ]
      2 => array:8 [
        "identificador" => "tbl0002"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "alt0003"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:2 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0061"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup rowgroup " rowspan="2" align="left" valign="top" scope="col" colspan="2"></th><a name="en0062"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="8" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Weeks</th><a name="en0063"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup rowgroup " rowspan="2" align="center" valign="top" scope="col" colspan="2" style="border-bottom: 2px solid black">Total Time</th></tr><tr title="table-row"><a name="en0065"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">1st</th><a name="en0066"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">2nd</th><a name="en0067"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">3rd</th><a name="en0068"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">4th</th></tr><tr title="table-row"><a name="en0070"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Training items&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0071"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Time&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0072"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0073"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0074"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0075"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0076"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0077"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0078"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0079"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0080"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0081"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">SIT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0082"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleItalic">Warm-up</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0083"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">&#40;min&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0084"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0085"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0086"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0087"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0088"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0089"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0090"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0091"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0092"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">200&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0093"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">200&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0094"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleItalic">Interval training</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0095"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">&#40;min&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0096"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">108&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0097"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">33&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0098"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0099"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">33&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0100"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">60&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0101"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">33&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0102"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">48&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0103"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">33&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0104"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">288&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0105"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">132<a class="elsevierStyleCrossRef" href="#tb2fn1">&#42;</a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0106"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleItalic">Strength training</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0107"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">&#40;min&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0108"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0109"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0110"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0111"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0112"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0113"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0114"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0115"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">120&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0116"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">480&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0117"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">480&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0118"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleItalic">Cool-down</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0119"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">&#40;min&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0120"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0121"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0122"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0123"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0124"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0125"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0126"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0127"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0128"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">200&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0129"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">200&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0130"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleItalic">Total Time</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0131"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">&#40;min&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0132"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">328&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0133"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">253&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0134"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">292&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0135"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">253&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0136"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">280&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0137"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">253&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0138"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">268&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0139"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">253&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0140"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">1168&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0141"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">1012&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0142"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead colgroup " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Number of sessions per week</span></td><a name="en0143"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0144"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0145"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0146"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0147"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0148"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0149"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0150"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0151"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">20&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0152"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">20&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab3563567.png"
              ]
            ]
          ]
          "notaPie" => array:1 [
            0 => array:3 [
              "identificador" => "tb2fn1"
              "etiqueta" => "&#8270;"
              "nota" => "<p class="elsevierStyleNotepara" id="notep0002">Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41; in total minutes of interval training between groups HIIT and SIT&#46;</p> <p class="elsevierStyleNotepara" id="notep0003">HIIT&#58; high-intensity interval training&#59; SIT&#58; sprint interval raining&#46;</p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara004" class="elsevierStyleSimplePara elsevierViewall">Total training time during the 4-week program&#46;</p>"
        ]
      ]
      3 => array:8 [
        "identificador" => "tbl0003"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "alt0004"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:2 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0153"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_rowgroup " rowspan="3" align="left" valign="top" scope="col" style="border-bottom: 2px solid black"></th><a name="en0154"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">V&#775;O<span class="elsevierStyleInf">2max</span> &#40;ml<span class="elsevierStyleSup">&#8722;1</span> kg<span class="elsevierStyleSup">&#8722;1</span> min<span class="elsevierStyleSup">&#8722;1</span>&#41;</th><a name="en0155"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">vV&#775;O<span class="elsevierStyleInf">2max</span> &#40;km <span class="elsevierStyleItalic">h</span><span class="elsevierStyleSup">&#8722;1</span>&#41;</th><a name="en0156"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Meters</th><a name="en0157"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HRmax &#40;bpm&#41;</th></tr><tr title="table-row"><a name="en0159"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0160"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0161"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0162"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0163"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0164"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th><a name="en0165"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">HIIT</th><a name="en0166"></a><th class="td-with-role" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">SIT</th></tr><tr title="table-row"><a name="en0168"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0169"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0170"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0171"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0172"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0173"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0174"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0175"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0176"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0177"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0178"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0179"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0180"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0181"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0182"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Pre&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><a name="en0183"></a><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">Post&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0184"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Mean&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0185"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">54&#46;88&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0186"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">59&#46;74 <a class="elsevierStyleCrossRef" href="#tb3fn2"><span class="elsevierStyleSup">&#8270;&#8270;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0187"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">56&#46;50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0188"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">55&#46;33<a class="elsevierStyleCrossRef" href="#tb3fn3"><span class="elsevierStyleSup">&#8224;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0189"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&#46;65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0190"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">18&#46;19<a class="elsevierStyleCrossRef" href="#tb3fn2"><span class="elsevierStyleSup">&#8270;&#8270;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0191"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17&#46;71&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0192"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17&#46;52<a class="elsevierStyleCrossRef" href="#tb3fn3"><span class="elsevierStyleSup">&#8224;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0193"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">2200&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0194"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">2779<a class="elsevierStyleCrossRef" href="#tb3fn2"><span class="elsevierStyleSup">&#8270;&#8270;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0195"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">2393&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0196"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">2254<a class="elsevierStyleCrossRef" href="#tb3fn3"><span class="elsevierStyleSup">&#8224;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0197"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">194&#46;69&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0198"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">191&#46;06<a class="elsevierStyleCrossRef" href="#tb3fn1">&#42;</a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0199"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">193&#46;38&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0200"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">192&#46;92&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><a name="en0201"></a><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">SD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0202"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;94&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0203"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;75&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0204"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;41&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0205"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&#46;54&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0206"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;93&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0207"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;19&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0208"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;85&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0209"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;13&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0210"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">361&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0211"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">462&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0212"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">438&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0213"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="top">583&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0214"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&#46;50&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0215"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&#46;97&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0216"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#46;70&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><a name="en0217"></a><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&#46;75&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab3563566.png"
              ]
            ]
          ]
          "notaPie" => array:3 [
            0 => array:3 [
              "identificador" => "tb3fn1"
              "etiqueta" => "&#8270;"
              "nota" => "<p class="elsevierStyleNotepara" id="notep0004">Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;01&#41; pre and post&#46;</p>"
            ]
            1 => array:3 [
              "identificador" => "tb3fn2"
              "etiqueta" => "&#8270;&#8270;"
              "nota" => "<p class="elsevierStyleNotepara" id="notep0005">Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;001&#41; pre and post&#46;</p>"
            ]
            2 => array:3 [
              "identificador" => "tb3fn3"
              "etiqueta" => "&#8224;"
              "nota" => "<p class="elsevierStyleNotepara" id="notep0006">Statistically significant difference &#40;<span class="elsevierStyleItalic">p</span>&#60;0&#46;05&#41; in post between groups HIIT and SIT&#46;</p> <p class="elsevierStyleNotepara" id="notep0007">HIIT&#58; high-intensity interval training&#59; SIT&#58; sprint interval training&#59; HRmax&#58; maximum heart rate expressed bump per minute&#59; SD&#58; standard deviation&#59; V&#775;O2max&#58; maximum oxygen output expressed ml per body mass per minute&#59; vV&#775;O2max&#58; velocity of the maximum oxygen output expressed by kilometers per hour&#46;</p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara005" class="elsevierStyleSimplePara elsevierViewall">Aerobic and maximum heart rate variables of YO-YO IR1 test at pre- and post-intervention program&#46;</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "cebibsec1"
          "bibliografiaReferencia" => array:27 [
            0 => array:3 [
              "identificador" => "bib0001"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "How has COVID-19 modified training and mood in professional and non-professional football players&#63;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "D&#46; Mon-L&#243;pez"
                            1 => "A&#46; Garc&#237;a-Aliaga"
                            2 => "A&#46;G&#46; Bartolom&#233;"
                            3 => "D&#46;M&#46; Solana"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:3 [
                        "tituloSerie" => "Physiol Behav"
                        "fecha" => "2020"
                        "volumen" => "227"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib0002"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of the COVID-19 confinement period on physical conditions in young elite soccer players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "M&#46; Dauty"
                            1 => "P&#46; Menu"
                            2 => "A&#46; Fouasson-Chailloux"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.23736/S0022-4707.20.11669-4"
                      "Revista" => array:7 [
                        "tituloSerie" => "J Sports Med Phys Fitness"
                        "fecha" => "2020"
                        "volumen" => "61"
                        "numero" => "9"
                        "paginaInicial" => "1252"
                        "paginaFinal" => "1257"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33269885"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0003"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Reopening elite sport during the COVID-19 pandemic&#58; experiences from a controlled return to elite football in Denmark"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "L&#46; Pedersen"
                            1 => "J&#46; Lindberg"
                            2 => "R&#46;R&#46; Lind"
                            3 => "H&#46; Rasmusen"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/sms.13915"
                      "Revista" => array:7 [
                        "tituloSerie" => "Scand J Med Sci Sports"
                        "fecha" => "2021"
                        "volumen" => "31"
                        "numero" => "4"
                        "paginaInicial" => "936"
                        "paginaFinal" => "939"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33480037"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0004"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "COVID-19-related restrictions and quarantine COVID-19&#58; effects on cardiovascular and yo-yo test performance in professional soccer players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "Albuquerque Freire Ld"
                            1 => "M&#46; Tannure"
                            2 => "M&#46; Sampaio"
                            3 => "M&#46; Slimani"
                            4 => "H&#46; Znazen"
                            5 => "N&#46;L&#46; Bragazzi"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:3 [
                        "tituloSerie" => "Front Psychol"
                        "fecha" => "2020"
                        "volumen" => "11"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0005"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Case report&#58; return to sport following the COVID-19 lockdown and its impact on injury rates in the German soccer league"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "D&#46;R&#46; Seshadri"
                            1 => "M&#46;L&#46; Thom"
                            2 => "E&#46;R&#46; Harlow"
                            3 => "C&#46;K&#46; Drummond"
                            4 => "J&#46;E&#46; Voos"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:3 [
                        "tituloSerie" => "Front Sports Active Living"
                        "fecha" => "2021"
                        "volumen" => "3"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib0006"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Correction&#58; Garc&#237;a-Aliaga et al&#46; comparative analysis of soccer performance intensity of the pre&#8211;post-lockdown COVID-19 in LaLiga&#8482;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "A&#46; Garc&#237;a-Aliaga"
                            1 => "M&#46; Marquina"
                            2 => "A&#46; Cord&#243;n-Carmona"
                            3 => "M&#46; Sillero-Quintana"
                            4 => "A&#46; de la Rubia"
                            5 => "S&#46;J&#46; Vielcazat"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.3390/ijerph18073685"
                      "Revista" => array:5 [
                        "tituloSerie" => "Int J Environ Res Public Health"
                        "fecha" => "2021"
                        "volumen" => "18"
                        "paginaInicial" => "3685"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/33916143"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            6 => array:3 [
              "identificador" => "bib0007"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Injuries during return to sport after the COVID-19 lockdown&#58; an epidemiologic study of italian professional soccer players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "D&#46; Mazza"
                            1 => "A&#46; Annibaldi"
                            2 => "G&#46; Princi"
                            3 => "L&#46; Arioli"
                            4 => "F&#46; Marzilli"
                            5 => "E&#46; Monaco"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "Orthop J Sports Med"
                        "fecha" => "2022"
                        "volumen" => "10"
                        "numero" => "6"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            7 => array:3 [
              "identificador" => "bib0008"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "LaLiga lockdown&#58; conditioning strategy and adaptation to in-game regulations during COVID-19 pandemic prevented an increase in injury incidence"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "V&#46; Moreno-P&#233;rez"
                            1 => "J&#46; Patricios"
                            2 => "N&#46; Amigo de Bonet"
                            3 => "Buil M&#193;"
                            4 => "J&#46; D&#237;az de Alda"
                            5 => "A&#46; Fern&#225;ndez-Posada"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.3390/ijerph19052920"
                      "Revista" => array:6 [
                        "tituloSerie" => "Int J Environ Res Public Health"
                        "fecha" => "2022"
                        "volumen" => "19"
                        "numero" => "5"
                        "paginaInicial" => "2920"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/35270612"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            8 => array:3 [
              "identificador" => "bib0009"
              "etiqueta" => "9"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Influence of the COVID-19 lockdown on Spanish professional soccer teams&#8217; external demands according to their on-field ranking"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "J&#46; Raya-Gonz&#225;lez"
                            1 => "T&#46; Garc&#237;a-Calvo"
                            2 => "A&#46; Rubio-Morales"
                            3 => "R&#46;L&#46; Del Campo"
                            4 => "R&#46; Resta"
                            5 => "J&#46;C&#46; Ponce-Bord&#243;n"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.5114/biolsport.2022.113294"
                      "Revista" => array:7 [
                        "tituloSerie" => "Biol Sport"
                        "fecha" => "2022"
                        "volumen" => "39"
                        "numero" => "4"
                        "paginaInicial" => "1081"
                        "paginaFinal" => "1086"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/36247957"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            9 => array:3 [
              "identificador" => "bib0010"
              "etiqueta" => "10"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Injury rates following the COVID-19 lockdown&#58; a case study from an UEFA futsal champions league finalist"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "K&#46; Spyrou"
                            1 => "P&#46;E&#46; Alcaraz"
                            2 => "E&#46; Mar&#237;n-Cascales"
                            3 => "R&#46; Herrero-Carrasco"
                            4 => "L&#46;A&#46; Pereira"
                            5 => "I&#46; Loturco"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "Apunts Sports Med"
                        "fecha" => "2022"
                        "volumen" => "57"
                        "numero" => "213"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            10 => array:3 [
              "identificador" => "bib0011"
              "etiqueta" => "11"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of the COVID-19 lockdown on neuromuscular performance and body composition in elite futsal players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "K&#46; Spyrou"
                            1 => "P&#46;E&#46; Alcaraz"
                            2 => "E&#46; Mar&#237;n-Cascales"
                            3 => "R&#46; Herrero-Carrasco"
                            4 => "D&#46;D&#46; Cohen"
                            5 => "J&#46; Calleja-Gonzalez"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Strength Condition Res"
                        "fecha" => "2021"
                        "volumen" => "35"
                        "numero" => "8"
                        "paginaInicial" => "2309"
                        "paginaFinal" => "2315"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            11 => array:3 [
              "identificador" => "bib0012"
              "etiqueta" => "12"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Influence of the COVID-19 lockdown and restart on the injury incidence and injury burden in men&#39;s professional football leagues in 2020&#58; the UEFA Elite Club Injury Study"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "M&#46; Wald&#233;n"
                            1 => "J&#46; Ekstrand"
                            2 => "M&#46; H&#228;gglund"
                            3 => "A&#46; McCall"
                            4 => "M&#46; Davison"
                            5 => "A&#46; Hall&#233;n"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1186/s40798-022-00457-4"
                      "Revista" => array:6 [
                        "tituloSerie" => "Sports Med-Open"
                        "fecha" => "2022"
                        "volumen" => "8"
                        "numero" => "1"
                        "paginaInicial" => "67"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/35552918"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            12 => array:3 [
              "identificador" => "bib0013"
              "etiqueta" => "13"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Coronavirus disease-19 quarantine is more detrimental than traditional off-season on physical conditioning of professional soccer players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "R&#46; Grazioli"
                            1 => "I&#46; Loturco"
                            2 => "B&#46;M&#46; Baroni"
                            3 => "G&#46;S&#46; Oliveira"
                            4 => "V&#46; Saciura"
                            5 => "E&#46; Vanoni"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Strength Condition Res"
                        "fecha" => "2020"
                        "volumen" => "34"
                        "numero" => "12"
                        "paginaInicial" => "3316"
                        "paginaFinal" => "3320"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            13 => array:3 [
              "identificador" => "bib0014"
              "etiqueta" => "14"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Detraining of specific neuromuscular qualities in elite footballers during COVID-19 quarantine"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "D&#46;D&#46; Cohen"
                            1 => "A&#46; Restrepo"
                            2 => "C&#46; Richter"
                            3 => "J&#46;R&#46; Harry"
                            4 => "M&#46;V&#46; Franchi"
                            5 => "C&#46; Restrepo"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Sci Med Football"
                        "fecha" => "2021"
                        "volumen" => "5"
                        "numero" => "1"
                        "paginaInicial" => "26"
                        "paginaFinal" => "31"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            14 => array:3 [
              "identificador" => "bib0015"
              "etiqueta" => "15"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A simple method for measurement of mechanical power jumping"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "C&#46; Bosco"
                            1 => "P Luhtanen"
                            2 => "P&#46;V&#46; komi"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "Eur J Appl Physiol"
                        "fecha" => "1983"
                        "paginaInicial" => "273"
                        "paginaFinal" => "282"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            15 => array:3 [
              "identificador" => "bib0016"
              "etiqueta" => "16"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The Yo-Yo intermittent recovery test&#58; a useful tool for evaluation of physical performance in intermittent sports"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "J&#46; Bangsbo"
                            1 => "F&#46;M&#46; Iaia"
                            2 => "P&#46; Krustrup"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.2165/00007256-200838010-00004"
                      "Revista" => array:6 [
                        "tituloSerie" => "Sports Med"
                        "fecha" => "2008"
                        "volumen" => "38"
                        "paginaInicial" => "37"
                        "paginaFinal" => "51"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18081366"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            16 => array:3 [
              "identificador" => "bib0017"
              "etiqueta" => "17"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Gross energy cost of horizontal treadmill and track running"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "L&#46; L&#233;ger"
                            1 => "D&#46; Mercier"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.2165/00007256-198401040-00003"
                      "Revista" => array:6 [
                        "tituloSerie" => "Sports Med"
                        "fecha" => "1984"
                        "volumen" => "1"
                        "paginaInicial" => "270"
                        "paginaFinal" => "277"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/6390604"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            17 => array:3 [
              "identificador" => "bib0018"
              "etiqueta" => "18"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Making meaningful inferences about magnitudes"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "A&#46;M&#46; Batterham"
                            1 => "W&#46;G&#46; Hopkins"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [
                        "tituloSerie" => "Int J Sports Physiol Perform"
                        "fecha" => "2006"
                        "volumen" => "1"
                        "numero" => "1"
                        "paginaInicial" => "50"
                        "paginaFinal" => "57"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19114737"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            18 => array:3 [
              "identificador" => "bib0019"
              "etiqueta" => "19"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Endurance and strength training for soccer players&#58; physiological considerations"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "J&#46; Hoff"
                            1 => "J&#46; Helgerud"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.2165/00007256-200434030-00003"
                      "Revista" => array:6 [
                        "tituloSerie" => "Sports Med"
                        "fecha" => "2004"
                        "volumen" => "34"
                        "paginaInicial" => "165"
                        "paginaFinal" => "180"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/14987126"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            19 => array:3 [
              "identificador" => "bib0020"
              "etiqueta" => "20"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Reduced volume and increased training intensity elevate muscle Na&#43;-K&#43; pump &#945;2-subunit expression as well as short-and long-term work capacity in humans"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "J&#46; Bangsbo"
                            1 => "T&#46;P&#46; Gunnarsson"
                            2 => "J&#46; Wendell"
                            3 => "L&#46; Nybo"
                            4 => "M&#46; Thomassen"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1152/japplphysiol.00358.2009"
                      "Revista" => array:7 [
                        "tituloSerie" => "J Appl Physiol"
                        "fecha" => "2009"
                        "volumen" => "107"
                        "numero" => "6"
                        "paginaInicial" => "1771"
                        "paginaFinal" => "1780"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19797693"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            20 => array:3 [
              "identificador" => "bib0021"
              "etiqueta" => "21"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Training and testing the elite athlete"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "J&#46; Bangsbo"
                            1 => "M&#46; Mohr"
                            2 => "A&#46; Poulsen"
                            3 => "J&#46; Perez-Gomez"
                            4 => "P&#46; Krustrup"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Exerc Sci Fit"
                        "fecha" => "2006"
                        "volumen" => "4"
                        "numero" => "1"
                        "paginaInicial" => "1"
                        "paginaFinal" => "14"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            21 => array:3 [
              "identificador" => "bib0022"
              "etiqueta" => "22"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Aerobic high-intensity intervals improve V&#729; O2max more than moderate training"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "J&#46; Helgerud"
                            1 => "K&#46; H&#248;ydal"
                            2 => "E&#46; Wang"
                            3 => "T&#46; Karlsen"
                            4 => "P&#46; Berg"
                            5 => "M&#46; Bjerkaas"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Med Sci Sports Exercise"
                        "fecha" => "2007"
                        "volumen" => "39"
                        "numero" => "4"
                        "paginaInicial" => "665"
                        "paginaFinal" => "671"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            22 => array:3 [
              "identificador" => "bib0023"
              "etiqueta" => "23"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "High-intensity interval training&#44; solutions to the programming puzzle&#58; part I&#58; cardiopulmonary emphasis"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "M&#46; Buchheit"
                            1 => "P&#46;B&#46; Laursen"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1007/s40279-013-0029-x"
                      "Revista" => array:7 [
                        "tituloSerie" => "Sports Med"
                        "fecha" => "2013"
                        "volumen" => "43"
                        "numero" => "5"
                        "paginaInicial" => "313"
                        "paginaFinal" => "338"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23539308"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            23 => array:3 [
              "identificador" => "bib0024"
              "etiqueta" => "24"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Etiology and recovery of neuromuscular fatigue following simulated soccer match-play"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "K&#46; Thomas"
                            1 => "J&#46; Dent"
                            2 => "G&#46; Howatson"
                            3 => "S&#46; Goodall"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1249/MSS.0000000000001196"
                      "Revista" => array:7 [
                        "tituloSerie" => "Med Sci Sports Exerc"
                        "fecha" => "2017"
                        "volumen" => "49"
                        "numero" => "5"
                        "paginaInicial" => "955"
                        "paginaFinal" => "964"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28060035"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            24 => array:3 [
              "identificador" => "bib0025"
              "etiqueta" => "25"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Concurrent training enhances athletes&#39; strength&#44; muscle endurance&#44; and other measures"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "W&#46;J&#46; Davis"
                            1 => "D&#46;T&#46; Wood"
                            2 => "R&#46;G&#46; Andrews"
                            3 => "L&#46;M&#46; Elkind"
                            4 => "W&#46;B&#46; Davis"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Strength Condition Res"
                        "fecha" => "2008"
                        "volumen" => "22"
                        "numero" => "5"
                        "paginaInicial" => "1487"
                        "paginaFinal" => "1502"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            25 => array:3 [
              "identificador" => "bib0026"
              "etiqueta" => "26"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Recovery in soccer&#58; part I&#8212;post-match fatigue and time course of recovery"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "M&#46; N&#233;d&#233;lec"
                            1 => "A&#46; McCall"
                            2 => "C&#46; Carling"
                            3 => "F&#46; Legall"
                            4 => "S&#46; Berthoin"
                            5 => "G&#46; Dupont"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Sports Med"
                        "fecha" => "2012"
                        "volumen" => "42"
                        "paginaInicial" => "997"
                        "paginaFinal" => "1015"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            26 => array:3 [
              "identificador" => "bib0027"
              "etiqueta" => "27"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The neuromuscular&#44; endocrine and mood responses to a single versus double training session day in soccer players"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "W&#46; Sparkes"
                            1 => "A&#46; Turner"
                            2 => "C&#46;J&#46; Cook"
                            3 => "M&#46; Weston"
                            4 => "M&#46; Russell"
                            5 => "M&#46; Johnston"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.jsams.2019.08.291"
                      "Revista" => array:7 [
                        "tituloSerie" => "J Sci Med Sport"
                        "fecha" => "2020"
                        "volumen" => "23"
                        "numero" => "1"
                        "paginaInicial" => "69"
                        "paginaFinal" => "74"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/31526664"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
          ]
        ]
      ]
    ]
    "agradecimientos" => array:1 [
      0 => array:2 [
        "identificador" => "xack750547"
        "vista" => "all"
      ]
    ]
  ]
  "idiomaDefecto" => "en"
  "url" => "/26665069/0000005800000218/v2_202406100409/S2666506923000135/v2_202406100409/en/main.assets"
  "Apartado" => array:4 [
    "identificador" => "82823"
    "tipo" => "SECCION"
    "en" => array:2 [
      "titulo" => "Original articles"
      "idiomaDefecto" => true
    ]
    "idiomaDefecto" => "en"
  ]
  "PDF" => "https://static.elsevier.es/multimedia/26665069/0000005800000218/v2_202406100409/S2666506923000135/v2_202406100409/en/main.pdf?idApp=UINPBA00004N&text.app=https://apunts.org/"
  "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2666506923000135?idApp=UINPBA00004N"
]

Article information

ISSN: 26665069
Original language: English

DOI:10.1016/j.apunsm.2023.100414

The statistics are updated each day

Year/Month	Html	Pdf	Total

2024 October	27	24	51
2024 September	62	66	128
2024 August	77	86	163
2024 July	69	62	131
2024 June	47	45	92
2024 May	98	59	157
2024 April	40	39	79
2024 March	46	57	103
2024 February	46	48	94
2024 January	33	45	78
2023 December	29	59	88
2023 November	57	74	131
2023 October	51	62	113
2023 September	124	261	385
2023 August	49	37	86
2023 July	130	77	207
2023 June	238	77	315
2023 May	210	87	297

Show all

Indexed in:

Follow us:

Subscribe:

Statistics

Indexed in:

Follow us:

Subscribe:

Statistics

Subscribe to our newsletter