通过模拟不同重量的手工搬举作业,分析竖脊肌的表面肌电信号,心电信号以及Borg量表分值的变化,以期反映重量在手工搬举作业中的影响;并通过JASA分析评价肌肉的疲劳变化,为我国制定手工搬举作业限值提供依据。实验结果显示,搬举时中位频率频谱左移,提示肌肉有发生疲劳的趋势,休息时中位频率频谱较搬举时中位频率频谱右移,但并未完全恢复到中位姿势时的中位频率,表明休息时肌肉疲劳恢复。 By simulating hand movements of different weights, the changes of surface EMG, ECG and Borg scales were analyzed in order to reflect the influence of weight in hand-picking exercise; and the muscle was evaluated by JASA Of fatigue changes, provide a basis for our country to set manual lifting work limits. The experimental results show that left shift of the median frequency spectrum during the lifting process indicates that the muscle tends to fatigue. When the resting frequency spectrum is shifted to the right than the middle frequency spectrum during the rest, the frequency does not completely return to the neutral position Median frequency, suggesting restful muscle fatigue at rest.