〈短報〉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

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