本研究主要目的在：一、比較國、高中田徑選手運動承諾與相關因素之差異情形；二、探討國中田徑選手運動承諾相關因素對運動承諾之預測情形；三、探討高中田徑選手運動承諾相關因素對運動承諾之預測情形。本研究以參加中華民國九十三年全國中等學校田徑錦標賽暨公開賽之國、高中男、女田徑選手共897人為研究對象。所有受試者被要求填寫基本資料與田徑選手運動承諾量表。以單因子多變量變異數分析及多元逐步迴歸方法分析所有資料。研究結果顯示：一、在「參與選擇」方面，高中選手顯著高於國中選手；而在「社會約束」方面，國中選手則顯著高於高中選手。二、運動樂趣、參與機會、社會約束以及個人投資是預測國中田徑選手運動承諾之主要因素；三、運動樂趣、個人投資、參與機會、社會約束以及參與選擇是預測高中田徑選手運動承諾之主要因素。最後，本研究根據研究結果提出具體建議，以供教練選手及未來研究參考。

The purposes of this study were：(1) to compare the differences of sport commitment and related factors for junior and senior high school track and field athletes; (2) to explore the factors that can predict sport commitment for junior high school track and field athletes; (3) to explore the factors that can predict sport commitment for senior high school track and field athletes. A total of 897 high school track and field athletes who participated in 2004 National Mid-school Track and Field Tournament were served as participants. All participants were asked to complete the demographic data and the inventory of sport commitment for track and field athletes. The one-way MANOVA and stepwise multiple regression statistics methods were used to analyze all collected data. The results from current study indicated that：(1) senior high school athletes had higher score in involvement alternatives factor than junior high school athletes, while junior high school athletes had higher score in social constraints factor than senior high school athletes. (2) sport enjoyment, involvement opportunities, social constraints and personal investments were four effective predictors that can predict junior high school track and field athletes' sport commitment. (3) sport enjoyment, personal investments, involvement opportunities, social constraints and involvement alternatives were five effective predictors that can predict senior high school track and field athletes' sport commitment. Finally, based on the results of the current study, the implications for the coaches and athletes and suggestions for the future studies are discussed.