| Summary: | 碩士 === 國立中正大學 === 運動與休閒教育研究所 === 93 === Purpose: The goal of this study was to investigate the correlations among maximal fat oxidation rate (Fatmax), maximal oxygen uptake,(VO2max) and ventilatory threshold, (VT), and whether the fat oxidation will change in 60-minute running at 100% FATmax intensity and 90% FATmax intensity Method: 12 young healthy college students, whose average age is 22.75±2.92, average height 173.33±5.56 cm and average weight 69.93±8.31kg. Each subject followed the counterbalance order to adopt treadmill graded exercise test (modified Bruce Protocol, to determinate VO2max and VT), FATmax treadmill graded exercise (to determine the individual FATmax ) and 60-minute 90% FATmax and 100% FATmax running exercise test. The oxidation rate of fat was indirectly measured by the ratio of carbon dioxide production (VCO2) to oxygen uptake(VO2 ). Result: The correlation coefficient of FATmax and VO2max and that of FATmax and VT were 0.54(p<.05) and 0.16(p>.05). In the beginning ten minutes, although the subjects were running at 100% FATmax and 90% FATmax intensity, the fat oxidation rate and quantity did not have significant difference. With the increasing time of exercise, HR increased significantly, and the fat oxidation rate and quantity had gradual increase, but VO2 did not increase. Conclusion: A significant correlation was found between FATmax and VO2max, not between VT and FATmax. When doing running exercise over 20 minutes, the fat oxidation rate and quantity of subjects running at 90% FATmax intensity were higher than those at 100% FATmax intensity despite the fact that the total energy consumption did not show significant difference
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