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首页> 外文期刊>Journal of Biomechanics >Age related differences in mechanical demands imposed on the lower back by manual material handling tasks
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Age related differences in mechanical demands imposed on the lower back by manual material handling tasks

机译：人工物料搬运任务对下背部施加的机械需求与年龄相关的差异

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The prevalence of low back pain (LBP) increases with age, yet the underlying mechanism(s) responsible for this remains unclear. To explore the role of biomechanical factors, we investigated age-related differences in lower-back biomechanics during sagittally-symmetric simulated manual material handling tasks. For each task, trunk kinematics and mechanical demand on the lower back were examined, from among 60 participants within five equal-sized and gender-balanced age groups spanning from 20 to 70 years old. The tasks involved lowering a 4.5 kg load from an upright standing posture to both knee height and a fixed height and then lifting the load back to the initial upright posture. During these tasks, segmental body kinematics and ground reaction forces were collected using wireless inertial measurement units and a force platform. Overall, older participants completed the tasks with larger pelvic rotation and smaller lumbar flexion. Such adopted trunk kinematics resulted in larger peak shearing demand at the lower back in older vs. younger participants. These results suggest that older individuals may be at a higher risk for developing lower back pain when completing similar manual material handling tasks, consistent with epidemiological evidence for higher risks of occupational low back pain among this cohort. (C) 2015 Elsevier Ltd. All rights reserved.
机译：下腰痛（LBP）的患病率随年龄增长而增加，但尚不清楚引起这种情况的潜在机制。为了探索生物力学因素的作用，我们调查了在矢状对称模拟人工材料处理任务期间，下背部生物力学中与年龄相关的差异。对于每项任务，检查了腰围运动学和机械需求，这些运动来自5个年龄相同且性别平衡的年龄在20至70岁之间的60名参与者中。任务包括将4.5千克的负载从直立站立姿势降低到膝盖高度和固定高度，然后将负载抬回到初始直立姿势。在这些任务中，使用无线惯性测量单元和测力平台收集分段的人体运动学和地面反作用力。总体而言，年龄较大的参与者以较大的骨盆旋转度和较小的腰部弯曲度完成了任务。这种采用的躯干运动学使得老年参与者和青年参与者在下背部的峰值剪切需求更大。这些结果表明，在完成类似的人工材料处理任务时，年龄较大的人患下腰痛的风险可能更高，这与该人群中职业性下腰痛风险较高的流行病学证据一致。 （C）2015 Elsevier Ltd.保留所有权利。

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