Seafarers, as a special occupational group, face high-intensity and prolonged repetitive upper limb tasks during ship maintenance, cargo loading and unloading, and navigation control, which are highly prone to musculoskeletal injuries and fatigue. This study aims to explore the effectiveness of a set of stretching exercises specifically designed for relieving fatigue from repetitive upper limb work in seafarers. The research integrates sports biomechanics modeling methods to deeply analyze the load distribution across upper limb joints and muscle coordination patterns under fatigue conditions, and based on this, designs a customized set of stretching exercises. Subsequently, through field empirical studies, the fatigue-relieving effects of these stretching exercises in real work environments are evaluated. The results indicate that the stretching exercises can significantly improve seafarers’ subjective fatigue perception, reduce muscle electromyographic activity levels, and enhance task precision, providing scientific evidence and practical intervention strategies for seafarer occupational health.

Xi Zheng. Relief of Fatigue from Repetitive Upper Limb Work in Seafarers through Stretching Exercises: Sports Biomechanics Modeling and Field Empirical Study. Frontiers in Sport Research (2025), Vol. 7, Issue 5: 63-68. https://doi.org/10.25236/FSR.2025.070510.

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