EFFECT OF POSTACTIVATION POTENTIATION ON THE MAXIMAL VOLUNTARY ISOKINETIC CONCENTRIC TORQUE IN HUMANS
EFFECT OF POSTACTIVATION POTENTIATION ON THE MAXIMAL VOLUNTARY ISOKINETIC CONCENTRIC TORQUE IN HUMANS
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DOI：
10.1519/jsc.0b013e3181b62c1d
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发表时间：
2011-01-01
影响因子：
3.2
通讯作者：
Kawakami, Yasuo
中科院分区：
文献类型：
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作者：
Miyamoto, Naokazu;Kanehisa, Hiroaki;Kawakami, Yasuo
Miyamoto，N，Kanehisa，H，Fukunaga，T，and Kawakami，Y.激活后增强对人类最大自主等速向心力矩的影响。J Strength Cond Res 25（1）：186-192，2011-本研究的目的是检查激活后增强（PAP）是否影响人体动态扭矩的发展。9名娱乐活跃的男性以180度/秒的速度按以下顺序进行3组最大等速同心足底屈曲：在10秒最大自主收缩（MVC）之前和之后立即（5秒），然后每1分钟一次，直到5分钟点，然后在10分钟点再进行1次刺激。在每组3次向心性收缩之前记录抽搐反应以检查PAP是否存在。在MVC后0至5分钟和1至3分钟，抽搐和向心性扭矩分别增强（p < 0.05），而在对照（无MVC）条件下，向心性扭矩没有显著差异（p > 0.05）。对于向心性收缩过程中的肌电信号，内侧腓肠肌的肌肉活动仅在条件MVC后立即显著抑制（p < 0.05）。这些结果表明，在适当的恢复间隔内，短暂的最大自主等长收缩通过PAP增强自主动力学性能。从实践的角度来看，在体育活动中，我们建议在自愿弹道或测力动作前1至3分钟进行PAP，通过高强度收缩来改善性能。
Miyamoto, N, Kanehisa, H, Fukunaga, T, and Kawakami, Y. Effect of postactivation potentiation on the maximal voluntary isokinetic concentric torque in humans. J Strength Cond Res 25(1): 186-192, 2011-The purpose of this study was to examine whether postactivation potentiation (PAP) influences dynamic torque development in humans. Nine recreationally active men performed sets of 3 maximal isokinetic concentric plantar flexions at 180 degrees/second in the following sequence: before and immediately (5 seconds) after a 10-second maximal voluntary contraction (MVC) and then every 1 minute until the 5-minute point, followed by 1 more stimulation at the 10-minute point. Twitch responses were recorded before every set of 3 concentric contractions to examine whether the PAP exists. The twitch and concentric torques were potentiated at 0 through 5 minutes and 1 through 3 minutes post-MVC, respectively (p < 0.05), whereas there was no significant difference in concentric torque in the control (without MVC) condition (p > 0.05). For electromyographic signals during concentric contractions, muscle activity of the medial gastrocnemius was significantly depressed only immediately after the conditioning MVC (p < 0.05). These results indicate that a brief maximal voluntary isometric contraction enhances voluntary dynamic performance through PAP, within proper recovery interval. From a practical point of view, in sports activities we suggest undertaking PAP through high-intensity contractions 1 to 3 minutes before voluntary ballistic or plyometric actions for improved performance.