等速运动负荷诱发肱二头肌疲劳过程中sEMG信号变化

sEMG Signal Changes of the Biceps during Dynamic Isokinetic Voluntary Contractions

本研究的目的在于观察动态等速运动诱发肱二头肌疲劳过程中 s EMG信号时频分析指标的动态变化规律 ,确定能够较好地运用于动态肌肉功能评价的 s EMG指标。研究结果表明 ,动态运动过程中时域分析指标 i EMG和 RMS的变化较小且与负荷持续时间无明显线性相关 ;频域分析指标 MPF和 MF变化较大 ,但是只有 MPF的变化与负荷持续时间呈明显线性相关 ;MPF时间序列曲线下降斜率与肌肉的总作功量之间明显相关 。

The purpose of this study was to determine the sEMG signal characteristics of biceps during dynamic isokinetic voluntary contractions and to select a more effective sEMG indices for muscle functional level prediction .The results showed both iEMG and RMS did not significantly increased and had no relationship with endurance time; Both MPF and MF decreased significantly with only MPF had good relationship with endurance time; The slope of MPF had a significant negative relationship with total muscle work and therefore be regarded as a good predictor of dynamic muscle function.