目的：比較600公尺跑走、800公尺跑走、9分鐘跑走和6分鐘步行測驗評估國小高年級肥胖男童心肺耐力的效度。方法：以18名國小肥胖男童為受試者，分別完成一次漸增負荷最大努力運動測驗及四種心肺耐力實地測驗，再以皮爾遜積差相關法考驗實地測驗成績與最大攝氧量的相關，並以直線迴歸決定係數（r^2）定義效度。結果：600公尺跑走、800公尺跑走、9分鐘跑走和6分鐘步行測驗成績，與最大攝氧量的相關分別為r=-.78、r=-.78、r=.70和r=.60，均達顯著水準（p＜.05）；實地測驗預測最大攝氧量的r^2分別為 .60、.61、.49和.36，估計標準誤分別為3.34秒、3.32秒、3.78秒與4.27秒。結論：證實四種心肺耐力實地測驗均可評估國小高年級肥胖男童心肺耐力，其中以600公尺跑走測驗較具時間效率。

Purpose: Examine the validity of cardiorespiratory fitness field tests, including 600-m run/walk, 800-m run/walk, 9-min run/walk and 6-min walk, for elementary obese male students. Methods: Eighteen elementary obese male students aged 11-12 yrs were recruited in the study. Each participant completed an incremental exercise test to evaluate the maximal oxygen consumption (V4O2max), and then performed four cardiorespiratory field tests, including the 600-m run/walk, 800-m run/walk, 9-min run/walk and 6-min walk test. The time required or the distances finished in those tests were defined as cardiorespiratory fitness. Data were analyzed by Pearson's product-moment correlation to verify the correlation between V4O2max and each of the four field tests performance. Besides, the coefficient of determination (r^2) derived from linear regression analysis was defined as validity. Results: The 600- m run/walk, 800-m run/walk, 9-min run/walk and 6-min walk test were significantly correlated to V4O2max, respectively (r=-.78, r=-.78, r=.70, r=.60, p ＜ .05). The coefficient of determination (r^2) for the four field tests were .60、.61、.49 and .36, while the standard error of estimates (SEE) was 3.34-s, 3.32-s, 3.78-s, and 4.27-s. Conclusion: All of the four tests were effective in evaluating the cardiorespiratory fitness for elementary obese male students. In terms of time efficiency, the 600-m run/walk test would be recommended for this specific population.