Are American children and youth fit? Some international perspectives.
Armstrong
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Research Centre University of Exeter, United Kingdom.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology; D010806:Physical Education and Training; D010809:Physical Fitness / Q000502:physiology; D006113:United Kingdom; D014481:United States