Effects of Two Passive Back-Support Exoskeletons on Muscle Activity, Energy Expenditure, and Subjective Assessments During Repetitive Lifting
Effects of Two Passive Back-Support Exoskeletons on Muscle Activity, Energy Expenditure, and Subjective Assessments During Repetitive Lifting
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DOI：
10.1177/0018720819897669
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发表时间：
2020-02-04
期刊：
影响因子：
3.3
通讯作者：
Nussbaum, Maury A.
中科院分区：
文献类型：
--
作者：
Alemi, Mohammad Mehdi;Madinei, Saman;Nussbaum, Maury A.
本研究的目的是探索两种不同的被动背部支撑外骨骼（BSE）设计在不同姿势的重复提升期间的功效。背景尽管BSE已被提出作为减少身体需求的潜在干预，关于不同外骨骼设计在不同工作场景中的影响的信息有限。（性别平衡）进行基于实验室的重复性提升任务的模拟。这些任务在12种不同的条件下进行，涉及两种BSE和一种控制条件，两种水平的提升对称性（对称和不对称），以及两种姿势（站立和跪姿）。结果的措施描述肌肉活动和能量消耗，沿着与感知不适，平衡，和usability.ResultsUsing BSE显着降低峰值活动的躯干伸肌（10%-28%）和能量消耗（4%-13%）在所有条件下测试。然而，这种减少取决于任务，并且在两个BSE之间存在差异。在大多数的测试条件下，使用BSEs积极影响主观反应，感知的努力和usability.ConclusionOur结果表明，有益的影响BSE是特定的任务，并取决于特定的BSE设计方法。需要更多的工作，虽然，更好地描述这一任务的特异性，并确定BSE的客观和主观的结果为更广泛的条件和users.ApplicationOur结果的概括性提供了新的证据，以指导选择和应用被动BSE设计在不同的起重任务。
ObjectiveThe aim of this study was to explore the efficacy of two different passive back-support exoskeleton (BSE) designs during repetitive lifting in different postures.BackgroundAlthough BSEs have been proposed as a potential intervention for reducing physical demands, limited information is available about the impacts of different exoskeleton designs in diverse work scenarios.MethodEighteen participants (gender-balanced) performed lab-based simulations of repetitive lifting tasks. These tasks were performed in 12 different conditions, involving two BSEs and a control condition, two levels of lifting symmetry (symmetric and asymmetric), and two postures (standing and kneeling). Outcome measures described muscle activity and energy expenditure, along with perceived discomfort, balance, and usability.ResultsUsing both BSEs significantly reduced peak activity of the trunk extensor muscles (by 10%-28%) and energy expenditure (by 4%-13%) in all conditions tested. Such reductions, though, were task dependent and differed between the two BSEs. In most of the tested conditions, using BSEs positively affected subjective responses regarding perceived exertion and usability.ConclusionOur results suggest that the beneficial effects of a BSE are task specific and depend on the specific BSE design approach. More work is needed, though, to better characterize this task specificity and to determine the generalizability of BSE effects on objective and subjective outcomes for a wider range of conditions and users.ApplicationOur results provide new evidence to guide the selection and application of passive BSE designs in diverse lifting tasks.