Cardiorespiratory fitness was evaluated using a gas analyzer (General Electric Corp) while the participant was performing a maximal incremental treadmill test (ergometer; h/p/cosmos sports & medical gmbh).43 (link) Peak height velocity, a common indicator of maturity in children and adolescents,50 (link) was calculated through the equations of Moore et al.51 (link) Parents self-reported their highest educational level attained and current occupation, as described elsewhere.26 (link),52 (link)
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