Abstract
843 It is well established that the anaerobic function in children improves during maturation. However, gender difference during this period has still to be clarified. The purpose of this study was to examine the effects of age and body composition on short-term cycling power output in prepubescent, pubescent and postpubescent girls (n = 465) and boys (n = 443). Peak Power output (PP) was measured with the Force Velocity Test (inertia of the flywheel included). Percent body fat and lean leg volume (LLV) were determined by anthropometry. Results showed that absolute PP; PP to body mass or LLV increased significantly ( P < 0.001) with age in both girls and boys until 18 yrs. PP was similar in both sexes before 14 yrs, whereas after 14 yrs, boys had significantly higher PP (+35%, P < 0.001) than girls (see fig.). When PP was standardized for body mass(W·kg-1) or for LLV (W·1-1) the gender-related differences was reduced (+25%, P < 0.001; +15%, P < 0.001, respectively). These results suggest that other factors than body composition may explain the gender differences in PP during growth.Figure
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