Construction accidents can be reduced by measuring worker fatigue and the relationship to unsafe behavior. However, previous research has mainly used subjective instruments such as subjective rating scale or questionnaires to collect worker fatigue and behavior data, which are highly subjective. This study improves an existing safety experiment method by analyzing the limitations of the existing safety experiment method and identifying worker physical and mental fatigue. A trial experiment to verify the effectivity and feasibility of the improved experimental method shows that this improved method better reflects the worker conditions and causes fatigue. This study also identifies key physiological indicators related to worker fatigue to support future research in this field.
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