de Looze M P, Zinzen E, Caboor D, van Roy P, Clarijs J P
Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands.
Ergonomics. 1998 Aug;41(8):1095-104. doi: 10.1080/001401398186405.
Poor muscle strength, relative to the physical demands of specific jobs, is considered a risk factor for low back pain. To gain an understanding of the underlying mechanisms, this study questioned whether muscle strength was related to task performance and low back load in nursing tasks. Trunk extension, elbow flexion and knee extension strength were therefore measured in 17 nurses. The independent effects of muscle strength on task duration, jerkiness of effort and L5-S1 torque were investigated as the nurses performed several patient handling tasks. Despite a large variation in muscle strength within the subject population, no effect of strength on task duration, jerkiness or L5-S1 torques was observed. In conclusion, poor muscle strength was found not to be related to increased low back load. If 'weaker' nurses were to be at a higher risk, it would be due to a reduced capability to withstand the mechanical load, rather than to an increased mechanical load.
相对于特定工作的体力需求而言，肌肉力量不足被认为是腰痛的一个风险因素。为了了解其潜在机制，本研究探讨了肌肉力量是否与护理工作中的任务表现和下背部负荷有关。因此，对17名护士测量了躯干伸展、肘部屈曲和膝盖伸展力量。在护士执行多项患者搬运任务时，研究了肌肉力量对任务持续时间、用力的急促程度和L5-S1扭矩的独立影响。尽管研究对象群体的肌肉力量差异很大，但未观察到力量对任务持续时间、急促程度或L5-S1扭矩有影响。总之，发现肌肉力量不足与下背部负荷增加无关。如果“较弱”的护士面临更高的风险，那将是由于承受机械负荷的能力降低，而不是机械负荷增加。
