初期短時間高強度運動がその後の軽強度運動での代謝に及ぼす影響

It is well known that high intensity and low intensity exercise facilitate carbohydrate and fat metabolism，respectively. Based on this view，two experiments were done in this study. Incremental and decremental loading method protocol (Fig. 1) were used in experiment I，and 5-minutes high intensity and fol1owing 30-minutes low intensity exercise (Fig. 2) were completed by two healthy adult men in experiment II. We measured oxygen intake，heart rate，lactate (one subject)，and respiratory exchange ratio (RER) during exercise. All exercises were performed on a cycle ergometer. The results were as follows;
1) Oxygen intake and RER showed a hysteresis loop，but heart rate and lactate did not so in the experiment of the incremental and decremental loading method protocol.
2) The RER showed lower values at low intensity exercise of immediately after short-time high intensity exercise than that at constant load exercise，however，the RERs at both conditions were almost same at last 5 minutes of exercise.