目的：比較橢圓機與跑步機在不同強度下攝氧量（oxygen consumption, VO2）與心跳率（heart rate, HR）的差異。方法：15名女大學生分別在橢圓機與跑步機進行80% VO2max（maximal oxygen consumption）與60% VO2max強度之運動測驗，以二因子變異數分析器材與運動時間對心肺適能變化量的影響。結果：80% VO2max強度，僅HR交互作用達顯著（p < .05），兩項器材的HR皆隨著運動時間增加而上升。而60% VO2max強度下，交互作用皆無顯著，但跑步機的VO2與HR在各時間階段均顯著大於橢圓機（p < .05）。結論：高強度（80% VO2max）時，跑步機與橢圓機的攝氧量無顯著差異，但會隨時間延長而提高心跳率，建議從事高強度運動的女性可選擇低衝擊的橢圓機；中等強度（60% VO2max）時，跑步機的VO2與HR顯著高於橢圓機，在中等運動強度下選擇足以刺激心肺功能的跑步機較易達到運動效益。

Purpose: The purpose of this study was to compare the differences in oxygen consumption (VO2) and heart rate (HR) at two exercise intensities of elliptical trainer and treadmill tests. Methods: Fifteen female college students were recruited as subjects. Each subject performed exercise test at intensity of 60% maximal VO2 (VO2max) and 80% VO2max on elliptical trainer and treadmill. Two-way (two exercise facilities × time points) ANOVA was used for analyzing the responses in VO2 and HR. Results: At intensity of 80% VO2max, significant interaction was only found in HR (p ＜ .05). Both protocols caused progressive increases in HR corresponding to exercise time. At intensity of 60% VO2max, there were no significant interaction effects. However, VO2 and HR at all time-points during treadmill test were significantly higher than those during elliptical trainer test (p ＜ .05). Conclusion: At high exercise intensity (80% VO2max), non-significant difference was shown between treadmill test and elliptical trainer test while the HR revealed a progressive rise corresponding to exercise time. We suggested the low-impact elliptical trainer exercise can be an alternative option for women during high intensity exercise. At moderate intensity (60% VO2max), VO2 and HR during treadmill test were both higher than those during elliptical trainer test. Therefore, the treadmill exercise could effectively stimulate cardiopulmonary responses while the intensity is moderate.

健身器材; 心跳率; 攝氧量

exercise facility; heart rate; oxygen consumption