Adaptations to fatigue during a repetitive multiplanar lifting task

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics Pub Date : 2025-06-29 DOI:10.1016/j.apergo.2025.104587

Emma J. Ratke , Dennis J. Larson , Michael W.R. Holmes , Shawn M. Beaudette

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引用次数: 0

Abstract

Warehouse workers are often required to perform physically demanding repetitive lifting tasks leading to fatigue. Previous research has primarily focused on constrained lifting tasks when investigating fatigue. The purpose of the current study was to investigate fatigue-based movement adaptations during a multiplanar, ecologically relevant lifting task. Participants (n = 28) lifted, transferred, and lowered a mass continuously for 60 min. Full body kinematics and muscle activity of the lumbar erector spinae, rectus abdominis, external oblique, and anterior deltoids were collected continuously. Results suggest that the load moment arm decreased across the trial (4% decrease), and participants tended to complete movements faster (4% decrease). Further, participants exhibited less variability in thorax-pelvis flexion deviation phase when fatigued (9% decrease). Finally, rectus abdominis activity increased (4%MVIC increase), while anterior deltoid activity decreased over time (2% decrease). These behavioural, coordination-based, and muscular adaptations to fatigue all have potential implications for injury risk in repetitive lifting tasks.

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在重复的多平面起重任务中适应疲劳

仓库工人经常被要求执行体力要求高的重复性起重任务，导致疲劳。先前的研究主要集中在研究疲劳时的受限举起任务上。当前研究的目的是调查在多平面、生态相关的举重任务中基于疲劳的运动适应。参与者（n = 28）连续举起、转移和降低重物60分钟。连续收集腰竖脊肌、腹直肌、外斜肌和前三角肌的全身运动学和肌肉活动。结果表明，负荷力臂在整个试验中减少（减少4%），参与者倾向于更快地完成运动（减少4%）。此外，参与者在疲劳时胸骨盆屈曲偏离阶段表现出较少的变异性（减少9%）。最后，腹直肌活动增加（mvic增加4%），而前三角肌活动随着时间的推移而减少（减少2%）。这些行为上的、基于协调的、肌肉对疲劳的适应，都可能导致重复性举重任务的损伤风险。

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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来源期刊

Applied Ergonomics 工程技术-工程：工业

CiteScore

7.50

自引率

9.40%

发文量

248

审稿时长

53 days

期刊介绍： Applied Ergonomics is aimed at ergonomists and all those interested in applying ergonomics/human factors in the design, planning and management of technical and social systems at work or leisure. Readership is truly international with subscribers in over 50 countries. Professionals for whom Applied Ergonomics is of interest include: ergonomists, designers, industrial engineers, health and safety specialists, systems engineers, design engineers, organizational psychologists, occupational health specialists and human-computer interaction specialists.