Pediatric concerns about competitive preadolescent sports.
D000056:Accident Prevention; D000293:Adolescent; D000367:Age Factors; D001161:Arteriosclerosis / Q000517:prevention & control; D001265:Athletic Injuries / Q000453:epidemiology / Q000517:prevention & control; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion; D010809:Physical Fitness; D011482:Protective Devices / Q000592:standards; D012572:School Health Services; D013177:Sports; D013178:Sports Medicine; D014481:United States