本研究旨在探討跳繩運動介入體育課程對國中學生體適能的影響。實驗是以雲林縣立古坑國中七年級學生共六十三名為實驗對象，進行12週每週二次跳繩訓練，實驗參加者於訓練前皆進行體適能前測。其中男生組32人，身高平均157.95±8.00公分，體重平均52.52±14.54公斤；女生組31人，身高平均154.89±5.34公分，體重平均45.73±8.47公斤。測驗資料以相依樣本t檢定來檢測實驗前、後測差異，將顯著水準訂為p<.05。實驗結果經分析與討論後，獲得結論為男生組在身體組成（BMI）、柔軟度（坐姿體前彎）、瞬發力（立定跳遠）及心肺耐力（800/1600m跑走）是有達顯著差異。但是在肌耐力（仰臥起坐）、左、右小腿周圍長及踝關節伸展方面卻未達顯著差異；女生組在柔軟度（坐姿體前彎）、心肺耐力（800/1600m跑走）及左、右小腿周圍長都達顯著差異。而在身體組成（BMI）、肌耐力（仰臥起坐）、瞬發力（立定跳遠）及踝關節伸展方面未達顯著差異。

　　The purpose of the study is to discuss the influnece of rope skipping intervened in P.E on junior high school students’ physical fitness. The subjects were 63 seventh graders,divided into a male group and a female group, at Gukeng junior high school, who skipped rope twince a week for twevel weeks. They all took a pretest in physical fitness before training. The average high of 32 male students is 157.95±8.00CM and the average of weight is 52.52±14.54 KG; the average high of 31 female students is 154.89±5.34 CM and the average weight is 45.73±8.47 KG. With dependent t-test, The test data was used to check if there was any difference between the pretest and the posttest; the significant level was set at p< .05. After analyzing the data, the study concludes that there is a sigificant difference in male students in respect to Body Mass Index (BMI), flexibility (Modified Sit and Reach Test), explosive strength (standing long jump) and cardio-pulmonary enduce (800/1600 meters running). However, they did not have a sigificant difference in endurance of muscle (sit-ups), lower leg girth and the stretch of ankle joints. The female students have large differences in flexibility (Modified Sit and Reach test), cardio-pulmonary enduce (800/1600 meters running), and the girth of both lower legs. By the contrast, the differences in Body Mass Index (BMI), endurance of muscle (sit-ups), and the stretch of ankle joints are subtle.