Effect of the chronological age and sexual maturation on the time to exhaustion at maximal aerobic speed FA Machado, LG Guglielmo, BS Denadai Biol Sport 2007; 24(1):21-30 ICID: 890701
Article type: Original article
IC™ Value: 9.36
Abstract provided by Publisher
The purposes of this study were: a) to verify the effect of chronological age and sexual maturation on the time to exhaustion at VO2max (tlim) and; b) to examine the reproducibility of tlim in boys aged 10-15 years. Forty boys, divided into 4 groups, in accordance to the chronological age (G10-12 and G13-15) and sexual maturation (P1-P3 and P4-P5 levels for pubic hair), performed the following tests: 1) incremental test for determination of VO2max and; 2) all-out exercise bout performed at VO2max to determine the tlim. There was no difference of tlim (sec) between G10-12 and G13-15 (181.596.3 vs. 199105.5). While the two measures of tlim were moderately related (r=0.78), tlim from the second test (226.696.1 s) was higher than that of the first (191.379.2 s). We can conclude that the tlim is not influenced by chronological age and sexual maturation. Besides, tlim presents a lower reproducibility in children and adolescents.