本研究旨在釐清不同登階高度與次數對三分鐘登階測驗評估有氧適能的影響。以31名男性大學生為受試對象，平均年齡19.77 ± 1.20歲、身高173.48 ± 6.26公分、體重64.34 ± 8.91公斤、最大攝氧量47.08 ± 3.39 ml．kg-1．min-1。所有受試者依Bruce protocol於原地跑步機進行一次最大努力運動測驗，並且依平衡次序參與九次種不同負荷登階測驗，負荷分別為登階高度30、35和40公分配合登階次數18、24和30次/分，蒐集彙整測驗過程之攝氧量及心跳數進行分析。透過積差相關法分析體能指數與最大攝氧量之相關；以重複量數單因子變異數分析法判定攝氧量的穩定狀態值，據此評估受試者參與測驗之平均相對運動強度；再以階層迴歸分析法檢視具各預測變項的預測力，所有統計值的顯著水準訂為α ＝ .05。結果顯示，針對男性大學生族群，宜選擇登階高度40公分和登階次數24次/分做為三分鐘登階測驗的負荷組合，據此反應出的相對運動強度約為70% VO2max及擁有最佳預測有氧適能的效度；而運動期第三分鐘及恢復期30秒的心跳數是最具有影響力的預測參數。未來可針對70% VO2max的相對運動強度，嘗試改變心跳數擷取時機與測驗後休息姿勢，探索適合特定族群的登階測驗組合與提升評估有氧適能的效度。

The purpose of this study was to evaluate the aerobic performance of 3-min step test using 3 stepping height and stepping cadences. Thirty-one college male subjects (M ± SD = 19.77 ± 1.20 years; 173.31 ± 6.62 cm; 64.34 ± 8.91 kg) had VO2max measured by Bruce treadmill test (M ± SD = 47.08 ± 3.39 years). Subjects performed nine step tests using stepping height were 30, 35, and 40 cm, stepping cadences were 18, 24, and 30 ascents/min, respectively. Direct measurements of VO2max obtained from the treadmill test were correlated with physical fitness index (PFI) calculated after nine different step tests. Results indicated the intensities of step tests were varied at moderate/high level. The prediction accuracy of the nine protocols was differ from each other, a 3-min step test with 40 cm of stepping height and 24 ascents/min of stepping cadences was deemed to be a more effective (R = .67, p < .05; intensity ≒ 70% VO2max) and practical field test to estimate the aerobic fitness of college males. Besides, the recommended parameters of predicting VO2max are heart beat counts during third minute in exercise phase and the first 30 seconds in recovery phase.

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