Failure of school physical education to improve cardiorespiratory fitness.
D000293:Adolescent; D001827:Body Height; D001835:Body Weight; D002170:Canada; D002648:Child; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D010313:Partial Pressure; D010806:Physical Education and Training; D010809:Physical Fitness; D012119:Respiration; D012129:Respiratory Function Tests; D012572:School Health Services