Jensen C, Nilsen K, Hansen K, Westgaard R H
Division of Organization and Work Science, Norwegian Institute of Technology, Trondheim.
Int Arch Occup Environ Health. 1993;64(6):415-23. doi: 10.1007/BF00517947.
Upper trapezius muscle activity was quantified by electromyographic (EMG) recordings using surface electrodes to study occupational muscle load as a risk indicator for the development of shoulder-neck complaints. Thirty-nine female production workers and thirty-two female office workers showed much larger interindividual differences than the mean difference in muscle activity between the two groups. By comparison with the production workers, the muscle activity patterns of the office workers were characterized by more short pauses and a lower static load. The median load level was similar for the two groups. For the office workers, but not for the production workers, weak correlations were found between symptoms of pain in the shoulder-neck region and some of the EMG parameters (static level and frequency of micropauses > 0.6 s. Current techniques for measuring shoulder muscle load by EMG recordings seem inadequate as screening methods to predict future risk of development of muscle pain symptoms.
通过使用表面电极进行肌电图（EMG）记录来量化上斜方肌的活动，以研究职业性肌肉负荷作为肩颈不适发展的风险指标。39名女性生产工人和32名女性办公室职员的个体差异远大于两组之间肌肉活动的平均差异。与生产工人相比，办公室职员的肌肉活动模式具有更多短暂停顿和更低静态负荷的特点。两组的中位负荷水平相似。对于办公室职员，而非生产工人，发现肩颈区域疼痛症状与一些EMG参数（静态水平和微停顿频率>0.6秒）之间存在弱相关性。目前通过EMG记录测量肩部肌肉负荷的技术作为预测未来肌肉疼痛症状发展风险的筛查方法似乎并不充分。
