A 14-week running program in 8- to 12-year-old boys significantly increased VO2max from 44.2 to 49.9 ml/kg/min compared to controls (p<0.05).
Does a 14-week running program improve VO2max, cardiac output, and arterial-venous O2 difference in 8- to 12-year-old boys?
A 14-week running program in 8- to 12-year-old boys significantly improves submaximal and maximal oxygen uptake, mediated by increases in arterial-venous oxygen difference.
p-value: p=<0.05
This study examined the effects of a 14-week running program on Formula: see text, as well as cardiac output Formula: see text and arterial-venous O 2 difference (a-vO 2 dif) at submaximal intensities corresponding to 50 and 75% of Formula: see text. Thirteen boys (mean age 10.6 ± 1.2 yrs) served as experimental subjects while 13 other boys of similar age (mean age 10.2 ± 1.2 yrs) served as controls. Mean Formula: see text in the runners increased 13%, from 44.2 ± 7.0 to 49.9 ± 6.3 ml∙kg −1 ∙min −1 . Posttraining Formula: see text during submaximal and maximal exercise was significantly (p 0.05). A-vO 2 dif increased by 8% at 50% of Formula: see text and by 6% at 75% of Formula: see text, and was significantly greater in the runners following training. These results indicate that increases in submaximal relative Formula: see text in children are mediated by increases in a-vO 2 dif and Formula: see text. Key words: cardiac output, arterial-venous oxygen difference, Formula: see text, CO 2 rebreathing, distance running
Mahon et al. (Wed,) reported a other. 14-week running program vs. Controls was evaluated on VO2max, cardiac output, and arterial-venous O2 difference (p=<0.05). A 14-week running program in 8- to 12-year-old boys significantly increased VO2max from 44.2 to 49.9 ml/kg/min compared to controls (p<0.05).