| Summary: | 碩士 === 國立中正大學 === 運動與休閒教育研究所 === 103 === Purpose：: The aim of this study was to investigate exercise economy (EE) in different seat heights of seated elliptical trainer and its relationship with maximal oxygen uptake (V ̇O_2max). Method: ：Subjects (N=30) were healthy adults with average age, height and weight of 23.77±3.69 years, 168.70±9.97 cm and 65.77±16.87 kg respectively. To obtain V ̇O_2max, each subject performed a maximal treadmill test. After 24 hours, all subjects were asked to choose one seating height (percent of upper limb involvement 35%、50%、65%) and participate in gradual increasing load test (16 watt, 、28 watt, 、41 watt, 、54 watt, 、66 watt) by seated elliptical trainer with pedaling rate setting up to 30 rpm. V ̇O_2、heart rate (HR) and rate of perceived exertion (RPE) were recorded in the last minute of each level. EEVO2、EEHR、EERPE meaned that V ̇O_2, HR and RPE were divided by load. Data was progressed by two way RM-ANOVA to compare the difference between seating position on EE and load on EE. Result: ：In the beginning, EE increased in gradual increasing load and reached stability when it was greater than 54 watt (50.25±11%V ̇O_2max). Furthermore, EEHR and V ̇O_2max reached significant correlation (r= -.67~ -.45, ，p<.05). Conclusion: ：EE had stable measurement results as the load was higher than 50%V ̇O_2max (70%HRmax). Changing seating position did not affect energy consumption. EEHR could predict V ̇O_2max efficiently.
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