The purpose of this study is to investigate the changes of EMG parameter both in isotonic and isometric exercise, and to study the relations among EMG parameters between athletes of different events.

• 摘要研究目的：探讨动力性与静力性肌肉收缩时EMG各参数的变化特征及疲劳时各指标的差异，比较不同项目运动员肌肉收缩特征对EMG参数的影响及与该项目的关系。