Effects of sitting and standing on upper extremity physical exposures in materials handling tasks

摘要: Sitting or standing work configurations modulate musculoskeletal risk. Most existing investigations of these have either studied them separately lacked focus on the upper extremity, particularly during manual materials handling (MMH) tasks. To address this gap, extremity loading in 20 male and females were assessed 4 MMH tasks sitting standing. Differences electromyographic (EMG) activity, local joint moments body discomfort between examined. Interactions task sit/stand configuration resulted increases up to 500% moments, 94% EMG activity 880% when completed while (p < 0.01). Future designers should consider placing workers postures feasible reduce loading, but not remain for extended periods time as negative effects both workspace geometries can instigate future disor...