Exercise--a preventive prescription.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003327:Coronary Disease / Q000517:prevention & control*; D003479:Curriculum; D006321:Heart / Q000502:physiology; D006801:Humans; D008168:Lung / Q000502:physiology; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D010809:Physical Fitness; D012574:Schools