Abstract
1932 In order to identify the effects of age, cycling performance needs to be adjusted for confounding effects of body size. Simple ratio standard (e.g. PP per body mass, W.kg−1) have been commonly used to compare subjects of different size. However, log-linear method (or power function) are recommended as more appropriate in accounting for body size effects. The purpose of this study was to examine the relationship between age and scaled PP in non-athletic males (n= 551) and females (n= 572) aged 7-21 y. PP was measured with the force velocity test (flywheel inertia included). The results showed that lean leg volume (LLV), determined by anthropometry, was higher correlated with PP than body mass in both gender (p < 0.01). Allometrically scaled revealed following equations: (Equations 1 and 2) Females equation showed an exponent close to 1: the relationship between PP and LLV was therefore approximately linear in females. Relationships between scaled PP and age were obtained (p < 0.001): (Table)TableWhen PP was appropriately scaled, we observed that age explained only 3-4% of the PP variance in both males and females. These results suggest that changes in muscular leg volume are largely responsible for PP increase during growth.
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