https://www.selleckchem.com/
PURPOSE Natural growth and maturation cause hemoglobin mass (Hbmass) and blood volume (BV) to increase during childhood and adolescence. Whether endurance training during the same period can cause further increases in these variables is not clear. Also, body composition develops differently in girls and boys during puberty, and the effect of these differences on hematological variables has not previously been studied. METHODS Forty-two endurance athletes (End-group; 24 boys) and 34 athletes from other sports (nonEnd-group; 23 boys) were tested at age 12, 13
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