Paschaleri, Z.*, Savva, E., Arabatzi, F.
Laboratory of Neuromechanics, Department of Physical Education and Sports Science, Serres, School of Physical Education and Sports Science, AUTh., Ag Ioannis, 62100, Serres, Greece
The aim of this study was to investigate the effects of sex and maturation on Counter Movement Jump (CMJ) performance in early adolescents. Forty-five students, twenty-three boys (age 12.5 ± 0.29) and twenty-two girls (age 10.5 ± 0.32) near the age of peak height velocity (PHV) participated in this study. Jump height (Height), peak power (Pmax) and maximum vertical force (Fmax) were evaluated on a Kistler platform. It was performed a mixed model repeated measure analysis of variance (RM ANOVA) to determine the interactive effects of sex (males vs. females), and maturity (18 months before PHV, 9 months before PHV, at PHV) for the Height, Pmax and Fmax (dependent variables). Girls exhibited greater relative Fmax (Fmax/weight) than boys 18 and 9 months before PHV, since boys exhibited greater relFmax near PHV. Additionally, boys exhibited greater Pmax compared to girls, mainly near PHV and higher jump height but they revealed a plateau in jump height progress near PHV. Both sexes improved jump performance near PHV. In conclusion, maturity affects vertical jumping performance in a different way for boys and girls in early adolescent.
Keywords: Adolescents; CMJ; jump height; maturity; sex differences.