terça-feira, 9 de dezembro de 2014

Determinação da potência pico e força máxima para membros superiores em atletas de BJJ

 2014 Dec 5. [Epub ahead of print]

Optimal load for the peak power and maximal strength of the upper body in Brazilian Jiu-jitsu athletes.


We determined the optimal load for the peak power output (PPO) during the bench press throw (BPT) in Brazilian Jiu-Jitsu (BJJ) athletes and compared the PPO and maximal strength between advanced (AD) and not advanced (NA) athletes. Twenty-eight BJJ athletes (24.8 ± 5.7 yrs) performed the BPT at loads of 30, 40, 50, and 60% of their 1 repetition maximum (1RM) in a randomized order (5 min rest between BPTs). The PPO was determined by measuring the barbell displacement by an accelerometer (Myotest). The absolute (F = 7.25; p < 0.001; and effect size [ES] = 0.21) and relative intensities were different (F = 7.11; p < 0.001; and ES = 0.21) between the AD and NA. There was also a group and intensity interaction effect (F = 2.79; p = 0.046; ES = 0.10), but the differences were centered around the AD group, which achieved higher values using 40% (p = 0.001) and 50% of the 1RM (p < 0.001) than the PPO with 60% of 1RM. The AD athletes presented with higher 1RM than NA (p < 0.05; ES = 1.0), but there was no difference (p > 0.05) in the PPO (30% to 60% 1RM). A polynomial adjustment indicated that the optimal load was ∼ 42% of 1RM for all groups and subgroups (R from 0.82 to 0.99). Our results suggest that there can be (1RM) differences between advanced and non-advanced BJJ athletes; however, there is no difference in the muscle power between the AD and NA groups. Additionally, ∼ 42% of 1RM seems to be the optimal load for developing maximal power using the bench press throw for the BJJ athletes.

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