目標：探討台大學生運動行為，並進一步分析社會階層與社會心理因素對運動行為之影響。 方法：本研究為橫斷式研究，利用電話訪問之方式收集台大學生之運動行為、社會階層及社會心理因素等資料。 結果：受試者共397人，其中62.7%表示平日有運動習慣，但真正符合美國運動醫學會認定之規律運動的標準則僅24.2%；其中男生有規律運動者佔31.6%，女生僅16.0%；低年級規律運動的比率為31.6%，高年級僅17.6%；父母教育程度高其規律運動比率高，在女生尤其明顯。可以預測全體受訪者規律運動之因素包括：性別、年級、自覺健康狀況；預測男性規律運動之因素則為年級及可利用金錢充裕程度；預測女性規律運動僅母親教育程度。 結論：台大學生規律運動比率偏低，社會階層與社會心理因素確實會影響規律運動行為，應好好思考如何增加學生規律運動行為。

　　　　　Objectives: This study investigated the exercise behaviors and correlates among undergraduate students at National Taiwan University. Methods: A cross-sectional telephone interview was used to collect information about students' exercise behaviors, socioeconomic status (SES) and psychosocial factors. Results: Among 397 students being interviewed, 62.7% of them had self-reported durable exercise. However, according to the ACSM's (American College of Sports Medicine) definition, only 24.2% of the students were qualified as having regular exercise, including 31.6% male students and 16.0% female students. Junior students were likely to have regular exercise than senior students (31.6% vs. 17.6%). Students with parents who had higher education were prone to regularly exercise, and this was more obvious in female students. Gender, grade, and perceived health status were predictors of regular exercise behaviors for all subjects. Grade and level of disposable income were predictors of regular exercise behaviors in male students. Mother's education level was the only predictor of regular exercise behaviors in female students. Conclusion: Regular exercise is generally not appreciated by university students. SES and psychosocial factors are associated with the practice of regular exercise in these students. It is worthwhile to make efforts to improve regular exercise behaviors among students.