Veiersted K B
National Institute of Occupational Health, Department of Physiology, Oslo, Norway.
Ergonomics. 1996 May;39(5):797-807. doi: 10.1080/00140139608964499.
The aim of this study was to evaluate the reliability of selected electromyographic (EMG) parameters describing the muscle activity in repetitive light work. EMG from the trapezius muscle of twelve female workers were recorded during a 20-min work session, morning and afternoon; Monday, Wednesday, Friday and the following Monday. The estimated reliability coefficient was 0.59 for static muscle activity and 0.85 for short interruptions in muscle activity (EMG gaps) during work. The reliability coefficient was 0.94 for the EMG signal's average median frequency of test contractions associated with the work session. The median frequency declined significantly during the work session. No time trend was found during the day or the week for these parameters. Consequently, it is possible to get representative measurements of the mentioned EMG parameters during repetitive light work by a recording taken at any time of the day or week.
本研究的目的是评估选定的肌电图（EMG）参数在重复性轻度工作中描述肌肉活动的可靠性。在周一、周三、周五及接下来的周一的上午和下午，对12名女性工人斜方肌的肌电图进行了20分钟的工作时段记录。静态肌肉活动的估计可靠性系数为0.59，工作期间肌肉活动短暂中断（肌电图间隙）的可靠性系数为0.85。与工作时段相关的测试收缩的肌电图信号平均中位频率的可靠性系数为0.94。在工作时段内，中位频率显著下降。这些参数在一天或一周内未发现时间趋势。因此，在一天或一周的任何时间进行记录，都有可能获得重复性轻度工作中上述肌电图参数的代表性测量值。
