Subject-specific, whole-body models of the stooped posture with a personal weight transfer device
Subject-specific, whole-body models of the stooped posture with a personal weight transfer device
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DOI：
10.1016/j.jelekin.2012.08.016
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发表时间：
2013-02-01
影响因子：
2.5
通讯作者：
Fathallah, Fadi A.
中科院分区：
文献类型：
--
作者：
Ulrey, Brent L.;Fathallah, Fadi A.
先前的一项实验室研究发现，当在弯腰姿势下佩戴重量转移装置时，躯干屈曲减少，并且没有经历竖脊肌屈曲放松的受试者的背部肌肉活动减少。全身肌肉骨骼模型，其中包括个人被动躯干刚度和人体测量，实施预测的背部和腿部关节的被动组织的负载。结果预测，当以弯腰姿势佩戴该器械时，L5-S1节段的压缩力和剪切力分别降低了13%和12%。腿部关节的内部载荷减少了10%至31%。关节载荷的大部分减少可能是由于器械在弯腰期间限制躯干屈曲的能力，而不是载荷转移。虽然这些结果显示了短期内可能的益处，但需要对长期影响进行进一步研究，以确定该设备是否是那些经常使用弯腰姿势的人的有效干预措施。(c)2012爱思唯尔有限公司保留所有权利。
A prior laboratory study found that when wearing a weight transfer device in the stooped posture, trunk flexions were reduced, and subjects who did not experience flexion-relaxation of the erector spinae had reduced back muscle activity. Whole-body musculoskeletal models, which included individual passive torso stiffness and anthropometry, were implemented to predict loads in the passive tissues of the back and the leg joints. Results predicted that when wearing the device in the stooped posture, compression and shear forces at the L5-S1 level were reduced by 13% and 12% respectively. Internal loads in the leg joints were reduced between 10% and 31%. Much of the reduction in joint loads may be a result of the device's ability to limit torso flexion during stoop, rather than a transferring of load. While these results show possible benefit in the short-term, further study is needed on the long-term effects to determine if the device is an effective intervention for those who use the stooped posture routinely. (c) 2012 Elsevier Ltd. All rights reserved.