The influence of sports training on the efficiency of juniors.
D000222:Adaptation, Physiological; D000293:Adolescent; D004526:Efficiency; D006339:Heart Rate; D006801:Humans; D008168:Lung / Q000502:physiology; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D010809:Physical Fitness; D013178:Sports Medicine