Vastus lateralis and vastus medialis muscle EMG activity that two relatively large range, almost the same time the beginning and ending, showing a high degree of consistency.
股外侧肌和股内侧肌这两块肌肉的肌电活动幅度比较大，几乎是同时开始，同时结束，表现出了高度的一致性。
AIM: To observe the changes of reaction time of muscle vastus medialis and gastrocnemius after fatigue and the interventional effects of Zheng's massage initiated by Zheng Huaixian on the changes.
目的：观察股内侧肌和腓肠肌疲劳后反应时的变化及应用郑怀贤教授创立的郑氏按摩手法对这种变化的影响。
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