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Vol. 46. Issue 171.
Pages 109-115 (July - September 2011)
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Vol. 46. Issue 171.
Pages 109-115 (July - September 2011)
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Efectes del Power Balance ® en l’equilibri estàtic i dinàmic de subjectes físicament actius
Effects of Power Balance ® in the static and dynamic balance in physically active subjects
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Fernando Valcárcel Péreza, Javier Abián Vicéna
a Facultad de Ciencias del Deporte, Universidad de Castilla-La Mancha, Toledo, Espanya
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Introducció

S’ha dit que una bona idea associada a un bon màrqueting pot esdevenir un fenomen social, independentment de la seva veracitat. El producte Power Balance® es proposa per millorar l’equilibri, a més d’altres aspectes físics (força, flexibilitat...). N’hi ha prou en portar “una polsera”. L’objectiu de l’estudi ha estat determinar si Power Balance® és capaç de millorar l’equilibri, diferenciant-ne l’efecte de l’anomenat “efecte placebo”.

Material i mètodes

Van participar voluntàriament a l’estudi 30 subjectes físicament actius (22 homes i 8 dones) d’una mitjana d’edat de 24,4 anys. Es van dur a terme dos tests d’equilibri (Standing Balance Test i Star Excursion Balance Test) amb metodologia “cec” i es van comparar les dades obtingudes en tres situacions: control, placebo i polsera.

Resultats

En comparar els resultats obtinguts en situació control i polsera no es van trobar diferències. Tampoc no se’n van trobar en comparar placebo i polsera. En canvi, se’n van trobar de significatives en quatre components de l’Star Excursion Balance Test en comparar la situació control amb la situació placebo (p < 0,05). Per tant, no hi ha diferències entre usar un placebo i usar Power Balance®, i l’efecte que un dels dos pot produir és degut a la suggestió.

Conclusions

Power Balance® no millora l’equilibri. No hi ha diferència entre utilitzar Power Balance® o utilitzar un placebo.

Palabras clave:
Placebo
Holograma
Equilibri
Power Balance ®
Introduction

It has been proposed that a good idea associated to good marketing can become a social phenomenon, regardless of its veracity. Besides many other physical aspects, like strength and flexibility Power Balance® is intended to improve balance just by wearing the bracelet. The purpose of the study is to determine if Power Balance® is able to improve balance, and distinguishing its effects from that known as the «placebo effect».

Material and methods

A total of 30 physically active volunteers participated in the study (22 males and 8 females) with an average age of 24.4years. Two balance tests took place (Standing Balance Test and Star Excursion Balance Test), using «blinding techniques». We then compared all the data obtained in the 3 different situations control, placebo and bracelet.

Results

There were no significant differences when comparing bracelet and control. There were no differences comparing placebo and bracelet. However, we did find differences in four components of Star Excursion Balance Test when comparing the control situation with the placebo situation. But there were no differences when using placebo and using Power Balance. The effects of any of them may be due to suggestion.

Conclusions

Power Balance® did not improve balance. There was no difference between Power Balance® and placebo.

Keywords:
Placebo
Hologram
Balance
Power Balance ®
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