EFFECT OF ENDURANCE EXERCISE ON CARDIORESPIRATORY FUNCTIONS AND PERFORMANCE IN DEVELOPING AGE

Abstract

In this study the effects of endurance exercise on cardiorespiratory functions and performance in developing age were exemined in 12 year old boys. Sujects were consisted of 11 boys who had been participating in training for soccer more than 2 hours a day for 6 days per week (S) and 10 non-participating boys for control (C) . Maximal oxygen uptake (Vo₂max), maximal heart rate (HRmax) and maximal cardiac output (Qmax) by acetylnerebreathing method were measured on the exercise on a treadmill. Five minute run was also administered.
Significant differences were found in Vo₂max (p<0.05), values of which were 2.13±0.07 1⋅min^-1 for S. and 1.86±0.08 1⋅min^-1 for C., respectively, and in Qmax (p<0.001), values of which were 17.9±1.41⋅min^-1 for S. and 12.4+0.71⋅min^-1 for C. G., respectively. There were no significant differences in HRmax and V_E between both groups. Values of stroke volume and V_E/Vo₂max were significantly higher for S.. Performances on 5 minute-run were 1164 m for S. and 1083 m for C, which showed significant difference (p<0.01) . Significant correlationship (r=0.746, p<0.001) was obtained between Vo₂max and Qmax. It was also found that the higher Vo₂max was, the higher Qmax was attaind.