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7096690 
Journal Article 
Effects of holographic bracelet on balance and muscle performance in soccer players: A quintuple-blind, placebo-controlled, crossover randomized clinical trial 
de Paula Lima, PO; Reboucas, NS; Chaves, SF; Lemos e Silva, R; Medeiros, MN; de Oliveira, RR; , 
2013 
Yes 
Isokinetics and Exercise Science
ISSN: 0959-3020 
IOS PRESS 
AMSTERDAM 
21 
4 
273-278 
WOS:000324990900002 
This study aimed to analyze the influence of holographic bracelets on body balance and peak torque in soccer athletes through a quintuple-blind, placebo-controlled, crossover randomized trial. Twenty-eight male athletes were evaluated in a stabilometric baropodometer (DIASU (R)) and performed a protocol involving concentric contractions of the knee at 60 degrees/s. Athletes were evaluated in three situations: no bracelet (baseline), with a placebo bracelet (PB) and holographic bracelet (HB). Comparing the mean torque peak at 60 degrees/s during knee extension, there was no statistical difference for the dominant limb (p = 0.713) and non-dominant (p = 0.996) between the baseline, PB and HB groups. No statistical difference was found comparing the mean oscillation ellipses from the right foot with eyes open (p = 0.359) and with eyes closed (p = 0.173), as well as from the left foot with eyes open (p = 0.891) and with eyes closed (p = 0.778). In conclusion, holographic bracelet has no influence on either body balance or knee muscle performance in athletes. 
Postural balance; muscle strength; soccer; holographic theory