title: Quantitative studies of the load on the back in different working-postures.
mesh_terms: D000328:Adult; D001415:Back / Q000502:physiology*; D004576:Electromyography; D006801:Humans; D008875:Middle Aged; D009132:Muscles / Q000502:physiology; D011187:Posture; D014938:Work Capacity Evaluation