IMPROVING THE PHYSICAL FITNESS OF YOUTH: A REPORT OF RESEARCH IN THE SPORTS-FITNESS SCHOOL OF THE UNIVERSITY OF ILLINOIS.
D000293:Adolescent; D002648:Child; D006801:Humans; D010806:Physical Education and Training; D010809:Physical Fitness; D012106:Research; D012574:Schools; D013178:Sports Medicine; D014481:United States
ADOLESCENCE; CHILD; PHYSICAL EDUCATION AND TRAINING; PHYSICAL FITNESS; SPORT MEDICINE; UNITED STATES