Gradational step tests for assessing work capacity.
D000293:Adolescent; D000328:Adult; D002320:Cardiovascular Physiological Phenomena; D006339:Heart Rate; D006801:Humans; D008297:Male; D008660:Metabolism; D008875:Middle Aged; D010101:Oxygen Consumption; D005082:Physical Exertion / Q000502:physiology*; D010809:Physical Fitness; D012119:Respiration