A Biomechanical Evaluation of Two Methods of Manual Load Lifting
A Biomechanical Evaluation of Two Methods of Manual Load Lifting
复制标题
两种手动举重方法的生物力学评估
DOI：
10.1080/05695557408974941
复制
发表时间：
1974
期刊：
影响因子：
--
通讯作者：
Chaffin DonB.
中科院分区：
文献类型：
--
作者：
Park KyungS.;Chaffin DonB.
自20世纪30年代中期以来，S一直主张举重时背部接近垂直，膝盖弯曲。这一建议的基础是，它将身体的压力从下背部转移到腿部。在某些情况下，该建议是无效的。本文对Chaffin和Baker的生物力学提举模型进行了扩展，考虑了竖脊肌和载荷加速度。数学模型显示，当使用推荐的“直背，屈膝”方法时，与常用的“弯腰”方法相比，竖脊肌和腰椎盘的受力可以高出50%。仅当对象最初靠近脊椎时，建议使用直背方法。
Abstract Since the middle 1930's it has been advocated that all lifting should be carried out with the back near vertical and with the knees bent. The basis for this recommendation has been that it shifts the stresses on the body from the low-back to the legs. Under certain conditions this recommendation is invalid. In this paper Chaffin and Baker's biomechanical lifting model is extended by considering the erector spinae muscles and by considering load accelerations. Mathematical modeling shows that forces on the erector spinae muscles and the lumbosacral disc can be as much as 50% higher when using the recommended “straight back, bent knees” method when compared to the common “stooped back” method. The straight back method is recommended only for lifts when the object is initially close to the spine.