Methods Static isometric loading of the biceps and low back muscle was performed in 14 subjects,using FFT power spectrum and its two dimensional mapping to analyze SEMG signals from these muscles.

• 方法14名受试者分别参加肱二头肌和腰部脊竖肌等长运动负荷实验,取表面肌电信号进行FFT功率谱及其功率谱二维地形图分析。