The EMG average amplitude was increased with the increase of the trunk rotation angle without significant difference (P>0.05).

随躯干旋转角度的增加，竖脊肌肌电幅度呈升高的趋势，但差异无统计学意义（P＞0．05）。

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There's so much momentum created by his racquet acceleration, trunk rotation, and the weight shift in his legs that Djokovic is off the court when he follows through.

德约科维奇的整个动作，球拍的速度、身体的转动和他腿部的重心转移产生了如此大的动力。

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This paper analyzes and discusses specific application of the conservation law of angular momentum in competitive sports, such as aerial tumbling, trunk rotation and somersault.

分析讨论了角动量守恒定律在空翻、转体以及旋空翻等竞技动作中的具体应用。

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