From the Centers for Disease Control. Vigorous physical activity among high school students--United States, 1990.
D000293:Adolescent; D000294:Adolescent Behavior; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion; D015995:Prevalence; D012309:Risk-Taking; D013177:Sports; D014481:United States