Physical work capacity during the day and at night.
D000293:Adolescent; D000328:Adult; D001683:Biological Clocks; D002940:Circadian Rhythm; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D010809:Physical Fitness; D013647:Task Performance and Analysis; D014937:Work