Abstract Summary
Repetitive overhead work remains a potent risk factor for development of musculoskeletal shoulder disorders. This study evaluated how subjective and objective measures of shoulder performance, and indicators of muscle fatigue, varied as a function of exertion height during a complex hand force exertion profile. The overhead condition resulted in lower endurance time, decreases in shoulder muscle frequency content and increased perceptions of discomfort, but no consistent differences in strength were observed.
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