title: Comparison of exercise responses in old and young men. I. The cardiac effort-total body effort relationship.
mesh_terms: D000293:Adolescent; D000368:Aged; D000375:Aging; D001794:Blood Pressure; D001827:Body Height; D001835:Body Weight; D002302:Cardiac Output; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D005082:Physical Exertion; D010809:Physical Fitness