Effects of holographic bracelet on balance and muscle performance in soccer players: a randomized placebo-controlled crossover trial

Abstract

s / Physical Therapy in Sport 13 (2012) e1–e6 e4 assessment was performed before and after an application of cryotherapy by immersion in water at 4 2 C for 20 minutes. For the statistical analysis, paired t-tests were performed. The significance level was set at 5% and the study was approved by the local ethics committee. Results: The following results were observed before and after an application of cryotherapy, in the inversion platform (in microvolts): LG (32.18 31.54 and 19.90 14.82 p1⁄4 0.44), TA (34.46 21.53 and 25.67 18.84, p1⁄4 0.05); PL (43.55 55.90 and 26.73 27.09, p1⁄4 0.79). In addition, before and after one-leg jump task: LG (96.28 39.81 and 71.47 33.43, p1⁄4 0.22); TA (160.47 87.07 and 77.19 48.23, p1⁄4 0.04; PL (168.27 127.81 and 124.16 90.12, p1⁄4 0.22). Conclusion: Only the TA presented a decrease in EMG activity following cryotherapy for both the inversion and one-leg jump tests. The results highlight the need for caution for the immediate return to play of the athlete after the use of cryotherapy on the ankle and foot.