Winkel J
Nord Med. 1989;104(12):324-7.
The innovation of technologies in the industrial countries in recent decades has involved increased physical monotony and inactivity in working life. Parallel to this development the ergonomic quality of work station design has been improved. But the corresponding reduction in physical stress does not seem to diminish the frequency of symptoms from the locomotor system. On the basis of studies carried out in recent years, a U-shaped relationship between physical stress and symptoms is suggested, i.e. frequency of symptoms may increase not only when the physical stress is high but also when it becomes very low. It is concluded that further research on acceptable physical stress should comprise studies aimed not only at upper but also at lower limits, including minimal variation of the physical load.
近几十年来，工业国家的技术创新导致工作生活中的身体单调感增加且缺乏活动。与此同时，工作站设计的人体工程学质量得到了改善。但身体压力的相应降低似乎并未减少运动系统症状的发生频率。根据近年来开展的研究，有人提出身体压力与症状之间呈U形关系，即症状发生频率不仅在身体压力高时可能增加，在压力变得非常低时也可能增加。得出的结论是，关于可接受身体压力的进一步研究不仅应包括针对上限的研究，还应包括针对下限的研究，包括身体负荷的最小变化。
