title: The effect of physical training on muscle enzyme activities and fiber composition in 11-year-old boys.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000367:Age Factors; D000886:Anthropometry; D002648:Child; D006651:Histocytochemistry; D006801:Humans; D008297:Male; D009132:Muscles / Q000166:cytology / Q000201:enzymology*; D009210:Myofibrils / Q000378:metabolism; D009218:Myosins / Q000378:metabolism; D010806:Physical Education and Training; D005082:Physical Exertion
chemical_list: D000251:Adenosine Triphosphatases; D009218:Myosins