title: Muscular working capacity in boys aged 13-14 years.
mesh_terms: D000293:Adolescent; D000332:Aerobiosis; D000693:Anaerobiosis; D002648:Child; D004734:Energy Metabolism; D005080:Exercise Test; D006801:Humans; D008297:Male; D009132:Muscles / Q000378:metabolism / Q000502:physiology*; D010101:Oxygen Consumption; D010807:Physical Endurance; D005082:Physical Exertion; D010809:Physical Fitness; D011627:Puberty