目的：本研究旨於探討不同持續時間的股四頭肌靜態伸展後，對於下肢爆發力的影響。方法：以20名無骨骼肌肉疾病之健康大學生（14男6女）為研究對象。受試者分別接受四種不同實驗處理，包含不伸展、15秒靜態伸展、30秒靜態伸展、60秒靜態伸展。本研究採重覆量數、平衡次序原則之實驗設計。受試者採立姿，以同側手拉同側腳尖，以最大自主努力往臀部靠近，兩腳均需達到實驗設計之時間。使用立定跳遠與Newtest測力板上做下蹲跳為施測項目，並以重覆量數單因子變異數分析與LSD事後考驗進行統計分析。結果：立定跳與下蹲跳之表現，達顯著差異（p<.05）。各組的比較顯示出15與30秒之靜態伸展顯著優於0與60秒之靜態伸展。由本研究結果，可以得到靜態伸展時間的大致上之優劣順序為30s>15s>（0s、60s）。結論：本研究結果發現於運動前做立即性靜態伸展，並不會對接下來的爆發力類型的運動呈現負面影響，而是有時間的適當性，此時間最佳為30秒，而15秒次之，而超過一分鐘的靜態伸展則會有反效果出現。

Purpose: This study is to explore how different durations of static stretching used as warm-ups manner will affect the explosive force of legs. Method: There are 20 healthy college students in the experiments (14 males and 6 females) and they participated in four different manipulations. The data were collected after each stretching strategies, included non-stretching, and stretching for 15s, 30s and 60s respectively. The protocol was based on repeated measures and the principle of balance of the order and every subject was required to stand on one foot at a time, with one hand drawing the ipsilateral leg closer to the buttocks with maximal voluntary efforts. Either foot stretching exercise had to meet the time requirement. Then the subjects were measured by means of standing long jump and CMJ on Newtest force plate. The data were analyzed by repeated one-way ANOVA and LSD post hoc test. Results: Significant differences were observed on standing long jump and CMJ (p < .05) and they show that static stretches for 15s and 30s had advantage over those for 0 second and 60 seconds. As the results suggested, different durations of stretching exercise would bring about different performances and the order from the best to the worse was 30s, 15s, non-stretching, and 60s. Conclusion: The study divulges the fact that doing immediate static stretching before exercise would not cause a negative influence on explosive performance, but there is a time domain adaptation. And then, the better choice for stretching duration is either ISs or 30s and 60s stretching is harmful for sport performance.