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Vol. 56. Issue 210.
(April - June 2021)
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Vol. 56. Issue 210.
(April - June 2021)
Original Article
DOI: 10.1016/j.apunsm.2021.100349
COVID-19: Analysis of cavitary air inspired through a mask, in competitive adolescent athletes
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Ignasi de Yzaguirre i Mauraa,
Corresponding author
14521iym@comb.cat

Corresponding author.
, Joaquim Terricabras Genísa,d, Diego Dulanto Zabalab, Mauricio Monacoe, Jordi Santiago Garciaa, Ferran Rupérez Vielbaa,d, Joan Vives i Turcóa, Gonzalo Graziolic
a Unitat de Medicina i Esport, Generalitat de Catalunya, Spain
b Hospital Universitario Basurto, Bilbao, Spain
c Àptima Centre Clínic, Mutua Terrassa, Spain
d Serveis médics Futbol Club Barcelona, Spain
e Aspetar Hospital-NSMP Aspire Academy Sports Medicine Center, Qatar
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Abstract
Introduction

Due to the mandatory use of a mask in the context of the COVID-19 pandemic, and the authorization to do outdoor sports in Catalonia, we set out to evaluate the physiological impact of the hypoxia and hypercapnia generated by the mask during aerobic exercise.

Methods

46 adolescent competitive athletes (35 women, 11 men) were evaluated. Measurements were taken of ambient air, at rest intra-mask, and during a stress test intra-mask. The concentration of O2 and CO2 intra-mask and the O2 Saturation were evaluated.

Results

The O2 of ambient air in the laboratory: 20.9%; Basal intra-mask O2: 18.0±0.7% and intra-mask O2 during exercise: 17.4±0.6% (p<0.0001). The CO2 was: 0.05±0.01% environmental; baseline intra-mask: 1.31±0.5%, and during exercise intra-mask: 1.76±0.6% (p<0.0001). Baseline O2 saturation with mask was 98.4±0.6% and immediately after exercise was 97.1±2.8% (p<0.03). During the exercise intra-mask, 30% of the young athletes exceeded 2% of CO2 and 22% breathed oxygen with a concentration lower than 17%.

Conclusions

The use of masks generate hypercapnic hypoxia during exercise. One third of the subjects exceed the CO2 threshold of 2%.

Keywords:
Hypoxia
Hypercapnia
Rarefied air
Facial mask
Sport
COVID-19

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