本研究的主要目的是:一、探討20公尺漸遠來回跑測驗之穩定性信度係數;二、比較20公尺漸遠來回跑與12分鐘跑預測最大攝氧量之同時效度。以五十名團立臺北師範學院男生為受試者，分別接受20公尺漸遠來回跑測驗、12分鐘跑走測驗與Bruce電動跑道最大攝氧量測量。採用變異數分析估計變項內信度係數與處爾遜積差相關法考驗效標變項與預測變項之闊傲。結果發現:一、20公尺漸遠來回跑(最大跑步速度與時間)穩定性信度係數R= .90 與.92。二、20公尺漸遠來回跑(最大跑步速度與時間)與最大攝氧量之相關r三.82與.83'連統計上的顯著水準(P<.Ol); 12分鐘跑走成績典最大攝氧量兩 者之相關r= .74 '連統計上的顯著水準(P<.Ol)。在本研究範國內，經分析結果得到如下結論:20公尺漸遠來回跑測驗之 信度係數是可以接受的水準;而效度係數較12分鐘跑走成績預測最大攝氧量要來得好。故20公尺漸遠來回跑走值得圍內加以採行，特別是可以激勵受試者的動機，而作為操場上評量有氧適能的簡易方法。

The purpose of this study was twofold: to determine (a) the test-retest reliability of the 20-m shuttle test (20-MST) (maximal run speed and time)， (b) compared the concurrent ralidity of the 20-MST and 12 minute run test (12-MRT) of aerobic fitness for predicting maximal 0xygen uptake. An intraclass coefficient of .90 and .92 were obtained in reliability the test twice， 1 week apart. (Mn = 226.68士15.64 vs. MT1= 227. 18士15.68; Mn = 754.10士110.56 vs. MTI二735.70士109.43). the correlation coefficient between V02 and the 20-MST in maximal run speed and time were found to be .82 and .83 (P<.01)， and that of V02 with the 12 min endurance run was .74 (P<.01). In conclusion， the 20-MST and 12-MRT field tests both appear to be valid predictors of V02 in male univresity students. However constraints of equipment and subjects motivation favor the 20-MST for the assessment of aerobic capacity.