Viitasalo J H, Komi P V
Acta Physiol Scand. 1975 Apr;93(4):531-9. doi: 10.1111/j.1748-1716.1975.tb05845.x.
Reliability and constancy of recordings of EMG signal characteristics were investigated from the measurements taken with miniature size surface electrodes during submaximal and maximal contraction of the rectus femoris muscle. The following EMG variables were studied: integrated EMG (IEMG) various bandwidths of the power spectral density function, mean power frequency (MPF), and rise time, amplitude and number of spikes of the averaged motor unit potential (AMUP). The results indicated that for most of the variables studied the reproducibility of measurements was better within the test session (reliability) than between the different test days (constancy). The reliability values for IEMG, MPF and AMUP amplitude were rather high (r=0.77-0.93) and it is suggested that these parameters can be recommended for use in EMG studies where recordings are repeated over a period of several days.
通过使用微型表面电极在股直肌次最大收缩和最大收缩期间进行测量，研究了肌电信号特征记录的可靠性和稳定性。研究了以下肌电变量：积分肌电（IEMG）、功率谱密度函数的各种带宽、平均功率频率（MPF）、上升时间、平均运动单位电位（AMUP）的幅度和尖峰数量。结果表明，对于大多数研究变量，测试期间测量的可重复性（可靠性）优于不同测试日之间（稳定性）。IEMG、MPF和AMUP幅度的可靠性值相当高（r = 0.77 - 0.93），建议在肌电研究中，如果记录在几天内重复进行，这些参数可推荐使用。
