Division of Work Physiology, National Institute of Occupational Health, Umeå, Sweden; Department of Preventive Medicine, Shiga University of Medical Science, Ohtsu, Japan.
J Electromyogr Kinesiol. 1992;2(2):103-11. doi: 10.1016/1050-6411(92)90021-A.
The effects of fatigue during a task involving prolonged repetitive light work were checked electromyographically and by rating the perceived musculoskeletal discomfort in seven different body regions. For a period of 120 min, 13 healthy female workers performed a repetitive light work task, simulating assembly work in electronics factories. The muscular activity levels were rather low, e.g., the median electromyographic (EMG) amplitude level during the work was 3-6% of maximal EMG amplitude level in the right trapezius muscle. According to the perceived musculoskeletal discomfort during the work task, the subjects were divided into a "most-complaining group" and a "least-complaining group." During the work task, a significant increase in the median EMG amplitude level of the right trapezius muscle was observed in the least-complaing group but not in the most-complaining group. The analysis of EMG signals revealed no definite signs of muscular fatigue during the work task in either of the two subgroups.
在一项涉及长时间重复轻工作的任务中，疲劳的影响通过肌电图和对七个不同身体区域的感知肌肉骨骼不适进行评估来检查。在 120 分钟的时间内，13 名健康的女性工人执行了一项重复的轻工作任务，模拟了电子工厂的装配工作。肌肉活动水平相当低，例如，在工作期间，右侧斜方肌的肌电图（EMG）幅度中位数为最大 EMG 幅度的 3-6%。根据工作期间的感知肌肉骨骼不适，将受试者分为“最抱怨组”和“最不抱怨组”。在工作任务中，在最不抱怨组中观察到右侧斜方肌的中位 EMG 幅度显著增加，但在最抱怨组中没有观察到。对 EMG 信号的分析表明，在这两个亚组中，在工作任务期间都没有明显的肌肉疲劳迹象。
