Musculoskeletal disorders (MSDs) are common among construction workers, mainly due to the effects of repetitive semi-squatting and weightlifting operations on lower limb health. To address the challenges associated with existing wearable devices, such as their bulkiness and limited mobility, this study aims to develop passive functional pants (PFPs) that use elastic straps for lifting assistance. The effectiveness of these PFPs in reducing muscle strain during semi-squat weightlifting tasks was evaluated through questionnaires and electromyography (EMG) experiments involving 32 healthy male participants. The results showed a decrease in the activity levels of the biceps femoris and rectus femoris muscles during weightlifting when participants wore the PFPs. A practical survey indicated satisfaction regarding the comfort, safety, and functionality of PFPs. In addition, it was noted that PFPs can enhance productivity while reducing the risk of MSDs. This study offers a lightweight, cost-effective, and practical solution for improving occupational health in the construction industry by developing PFPs that enhance wearability, comfort, and usability, thereby alleviating the economic burden associated with work-related MSDs.
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