双侧膝关节屈伸肌群达峰力矩的时间（TPT）随测试速度的增加而减小，同一测试速度下伸肌达峰力矩的时间大于屈肌；
The time to peak torque(TPT) of junior athletes reduced with the test speed increasing and the time of extensors TPT are longer than flexors;
双侧膝关节屈伸肌群达峰力矩的时间（TPT）随测试速度的增加而减小，同一测试速度下伸肌达峰力矩的时间大于屈肌；
The time to peak torque(TPT) of junior athletes reduced with the test speed increasing and the time of extensors TPT are longer than flexors;
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