Araujo R C, Duarte M, Amadio A C
Laboratory of Biomechanics, School of Physical Education and Sports, University of São Paulo, Brazil.
Electromyogr Clin Neurophysiol. 2000 Jun;40(4):225-9.
The objective of the present study was to evaluate the variability of the surface EMG signal of the same muscle in healthy subjects, because of lack of reproducibility of the EMG signal for the same subject and muscle in different trials of maximal isometric voluntary contraction. The results showed an EMG coefficient of variability of 21.61%, indicating that this variability must be considered in experiments with an inappropriate condition for normalization procedures, such as EMG biofeedback in rehabilitation sessions, or normalization procedures by the maximal isometric voluntary contraction.
本研究的目的是评估健康受试者同一肌肉表面肌电信号的变异性，因为在最大等长自主收缩的不同试验中，同一受试者同一肌肉的肌电信号缺乏可重复性。结果显示肌电变异系数为21.61%，这表明在诸如康复训练中的肌电生物反馈或通过最大等长自主收缩进行归一化处理等归一化程序条件不当时，实验中必须考虑这种变异性。
