The purpose of this study was to investigate the prevalence of muscle fatigue symptoms and its relation to the job demands among industrial workers with repetitive light tasks. The participants were one hundred and sixty seven workers from the manufacturing and electronics industries in Lembah Klang Malaysia. The results show that the prevalence of muscle fatigue symptoms is high among industrial workers in the manufacturing and electronics sectors. The highest prevalence was for the shoulder

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... 0.659%) and neck (65.269%). The prevalence of muscle fatigue symptoms were found to be higher for females than males. The higher prevalence of muscle fatigue symptoms are found to be related to job demand factors, particularly monotonous, attention requirement, precision, and repetitiveness.