Effects of lift style and dynamics during repetitive lifting

Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) Pub Date : 1997-10-30 DOI:10.1109/IEMBS.1997.757054

C. Kuzkaya, J. Boston, T. Rudy, S. Lieber

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引用次数: 4

Abstract

Proposes that, in a dynamic lifting task, individuals adjust their lifting style to minimize a cost function involving some combination of work performed and forces generated in the spine. This proposal is to be evaluated with data previously obtained in a large experimental study of low-back pain patients before and after treatment. Because of limitations in the data collected for this study, an approximate three-segment model of the body is to be used to estimate the total work performed per lift and the moment generated at the hip, using as inputs the hip and knee angles as functions of time during the lift and the patient's height and weight. Simulation results are presented to illustrate the effects of lift type and dynamics on work and hip moment. The model then is applied to a sample of 15 patients and 15 controls. The results show that controls lift heavier loads than the patients do, but at a cost of incurring higher moments at the hip. Assuming that these moments reflect greater forces in the spine, the results suggest that controls are willing to tolerate greater spinal forces than patients in order to perform efficient lifts.

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在重复举重过程中，举重方式和动力的影响

建议，在动态举重任务中，个体调整他们的举重方式，以最小化成本函数，包括一些完成的工作和脊柱产生的力的组合。这一建议将根据先前在治疗前后腰痛患者的大型实验研究中获得的数据进行评估。由于本研究收集的数据的局限性，我们将使用一个近似的身体三段模型来估计每次抬举所做的总功和髋关节产生的力矩，并使用髋关节和膝关节角度作为输入，作为抬举过程中时间的函数以及患者的身高和体重。仿真结果说明了升力类型和动力对工作力矩和髋部力矩的影响。然后将该模型应用于15名患者和15名对照组的样本。结果表明，控制者比患者举起更重的负荷，但代价是髋部的力矩更高。假设这些力矩反映了脊柱上更大的力，结果表明，为了进行有效的提升，对照组比患者更愿意忍受更大的脊柱力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136)

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