高強度一定負荷運動時における酸素摂取動態

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1. Oxygen uptake kinetics in sprinters (SPR ; n=5) and long distance runners (LDR ; n=7) was investigated during short-term heary exavcise (<3 min) at a constant power output to require a V0_2 equal to 50% between lactate threshold and maximal oxygen uptake (50%Δ). 2. We examined relationships between oxygen uptake kinetics (fast and slow components) during short-term heavy exercise and aerobic work capacity (VO_2@LT, VO_2max), and a possibility of presumption of muscle fiber type from oxygen uptake kinetics during short-term heavy exercise, assuming that muscle fiber type would be associated with oxygen uptake kinetics during heavy exercise. 3. The relative magnitude of the slow component was significantly correlated with % type II fiber estimated from relationship between muscle efficiency and fiber type (r=0.625, p<0.05). 4. Time constant of fast component in LDR was significantly faster than that in SPR (p<0.001). Time constant of fast component was also significantly correlated with V0_2 max (r=0.888, p<0.001) and VO_2@LT (r=0.847, p<0.01). 5. Time constant of fast component was significantly correlated with 10 km running performance in only LDR (r=0.803, p<0.05). 6. We conclude that aerobic work ability could be estimated from oxygen uptake kinetics during high intensity exercise. On the other hand, a clear conclusion was not drawn in this study as to noninvasive presumption of muscle fiber type from oxygen uptake kinetics during short-term heavy exercise.
久留米大学の論文
1997-07-01

高強度一定負荷運動時における酸素摂取動態

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