Sports medicine: its past, present and future.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005060:Europe; D005260:Female; D049690:History, Ancient; D006801:Humans; D008297:Male; D010809:Physical Fitness; D012922:Social Change; D013177:Sports; D013178:Sports Medicine / Q000639:trends*; D019966:Substance-Related Disorders / Q000453:epidemiology; D014481:United States