A comparison of work efficiency between urban and suburban children.
D000222:Adaptation, Physiological; D000293:Adolescent; D000886:Anthropometry; D002648:Child; D005260:Female; D006339:Heart Rate; D006801:Humans; D007564:Japan; D008297:Male; D008433:Mathematics; D010101:Oxygen Consumption; D005082:Physical Exertion; D012737:Sex Factors; D014505:Urban Population