论文部分内容阅读
在实验室对受试者采取坐位时腰部肌肉疲劳的发生过程与肌电图的变化之间的关系进行了研究。结果表明，在不同的躯干角时，肌电图积分值（ＩＥＭＧ）均随坐位时间的延长呈现开始时略有上升，以后逐渐下降的趋势，且随躯干角增大，这种变化起义越明显，提示ＩＥＭＧ的这种变化反映了肌肉疲劳的发生发展过程，结合疲劳症状的发生情况，建议把ＩＥＭＧ值低于初始值（正常水平）时作为疲劳实际出现的时间。
The relationship between the occurrence of lumbar muscular fatigue and changes in EMG when the subject was sitting in the laboratory was studied. The results showed that at different trunk angles, the integral value of electromyography (IEMG) showed a slight increase at the beginning with the increase of sitting time, and then decreased gradually. With the increase of trunk angle, the change of EMG became more obvious , Suggesting that this change in IEMG reflects the occurrence and development of muscle fatigue, combined with the occurrence of fatigue symptoms, it is recommended IEMG value below the initial value (normal level) as the actual occurrence of fatigue time.