Expert consensus on time-based thresholds for fast-paced movements and static postures provides a starting point for standardized ergonomic assessment. The absence of consensus on amplitude thresholds highlights the need for field validation studies examining which thresholds capture measurement reliability and prediction of musculoskeletal health outcomes. These findings support efforts toward transparency and alignment in upper arm exposure definitions across research and practice, while acknowledging remaining conceptual and methodological challenges.
Frost et al. (Tue,) studied this question.