Abstract Job rotation aims to reduce muscle fatigue by switching between functionally different tasks to theoretically lessen the risk of site-specific fatigue and work-related musculoskeletal disorders (WMSDs). The effectiveness of job rotation in mitigating the onset of muscle fatigue is partially known, but there is limited ergonomic data on female populations despite comparatively lower upper body strength and increased risk of WMSDs. Rotating between two functionally different tasks, continuing a single task, and varying task order were assessed in the present study for influence on muscle fatigue indicators in a female population. Participants performed a randomized set of four task combinations involving two unilateral, repetitive shoulder tasks (forward flexion and internal rotation). During these combinations, maximal voluntary force, mean power frequency, average EMG (aEMG) and ratings of perceived exertion (RPE) were recorded. Differences between task combinations and time were tested using a two-way repeated measures ANOVA. Indications of fatigue were limited in the results. Forward flexion (p = 0.004) and internal rotation (p = 0.002) maximum voluntary force declined in all task combinations while RPE increased (p

中文翻译：

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工作轮换和任务顺序对女性肌肉反应的影响

摘要 工作轮换旨在通过在功能不同的任务之间切换来减少肌肉疲劳，从而在理论上降低特定部位疲劳和工作相关肌肉骨骼疾病 (WMSD) 的风险。工作轮换在减轻肌肉疲劳发作方面的有效性是部分已知的，但尽管上肢力量相对较低且 WMSD 风险增加，但关于女性人群的人体工程学数据有限。在本研究中评估了在两个功能不同的任务之间轮换、继续单个任务和不同的任务顺序对女性人群肌肉疲劳指标的影响。参与者执行了一组随机的四个任务组合，涉及两个单侧、重复的肩部任务（前屈和内旋）。在这些组合中，最大自愿力，记录平均功率频率、平均肌电图 (aEMG) 和感知用力 (RPE) 等级。使用双向重复测量方差分析测试任务组合和时间之间的差异。结果中的疲劳迹象有限。在所有任务组合中，前屈 (p = 0.004) 和内旋 (p = 0.002) 最大随意力下降，而 RPE 增加 (p