Studies of back load, tolerance limits during lifting of burdens.
D000367:Age Factors; D001827:Body Height; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000502:physiology; D012737:Sex Factors; D013131:Spine / Q000502:physiology*; D014938:Work Capacity Evaluation