Trunk loading and expectation.
D000328:Adult; D001415:Back / Q000502:physiology*; D001696:Biomechanical Phenomena; D006801:Humans; D008297:Male; D009132:Muscles / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D013177:Sports; D014891:Weight Lifting