Experiences with physical conditioning programs in middle-aged men.
D000328:Adult; D001835:Body Weight; D006331:Heart Diseases / Q000517:prevention & control; D006334:Heart Function Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D010808:Physical Examination; D005082:Physical Exertion; D010809:Physical Fitness; D011674:Pulse; D012119:Respiration