慢跑鞋是跑步運動中不可或缺的運動元件，而避震則是慢跑鞋的主要功能之ㄧ，長期使用慢跑鞋，在其避震能力有明顯衰退時，及時的汰舊換新可避免下肢運動傷害的發生。本研究的目的為評估人體穿著慢跑鞋快走、慢跑和快跑時，著地撞擊地面的撞擊能量範圍，作為材料測試撞擊能量設定之依據。並評估慢跑鞋在長時間使用情形下其避震能力是否發生衰退，並由人體測試來檢測慢跑鞋的避震效應是否會因長時間使用而改變。一款市售慢跑鞋作為撞擊能量評估的受測鞋，藉由材料測試和人體測試的比較結果，評估快走、慢跑及快跑著地時對鞋底的撞擊能量分別為0.45~1.85、1.07~2.08及2.06~4.00 joule。兩款市售慢跑鞋(Nike air shox和Mizuno wave)共17雙，其中15位有慢跑習慣的受試者各穿著一雙作為測試鞋，進行長期跑步機跑步實驗，另兩雙為對照鞋。穿著Nike air shox的受試者中，有4位累積跑步距離至400公里，一位受試者累積跑步距離達900公里；穿著Mizuno wave的受試者中，有5位累積跑步距離至200公里。慢跑鞋材料測試的結果顯示，兩款慢跑鞋在累積長距離跑步的過程中，撞擊力峰值有持續增加的現象，但兩款對照鞋在經過12個月的定期追蹤後，發現與實驗鞋一樣避震能力都有些微衰退的現象，因此推論慢跑鞋使用初期避震能力的衰退應是放置時間所造成。在人體測試的30分鐘跑步測試中，脛骨加速度無論是在跑步過程中，或是隨著累積跑步距離增加，幾乎都沒有出現隨之增加的現象。人體實際跑步的變異性過大，或受試者無法達到疲勞狀態都可能是導致此現象的原因。根據本研究的結果建議從事跑步機運動的跑者，可以準備一雙跑步機運動的專用慢跑鞋，則慢跑鞋的避震能力在經過至少400公里的跑步使用後，仍不會有明顯衰退的現象。

The purpose of this study was to estimate the impact energy range as foot strike for walking, jogging and running. Changes of the cushioning ability of running shoes after long distance running were investigated in this study. With comparisons of the material and subject tests, the impact energy as heel strike was 0.45~1.85 joule, 1.07 ~ 2.08 and 2.06~4.00 joule for walking, jogging and running, respectively. Seventeen pairs of two type running shoes (Nike air shox and Mizuno wave) were used in this study. Fifteen pairs are the testing shoes and the other two pairs are the control shoes. Each of fifteen subjects wore a new shoe at the beginning of the experiment and proceed the long-term treadmill running. The total running distances of four subjects with Nike air shox were 400km, one subject even accumulated running distance to 900km; the total running distances of five subjects with Mizuno wave were 200km. The results of material test showed that impact force peaks significantly increased as the running distance increased. But the results of control shoes regularly tracking during 12 months was shown that the cushioning ability has slight decline as the results of testing shoes. The initial attenuation of running shoes cushioning ability may be attributed to age of the shoes. In the subject test, the tibial peak accelerations didn’t increase as the running distance and running time increased. The variability of human running or subjects cannot reach fatigue in 30 minutes treadmill running may be the reasons that the tibial impact acceleration didn’t change after long distance or long time running. According to the results of this present study, it is recommended that treadmill runners should prepare a running shoe that is dedicated for treadmill exercise, eventually the cushioning ability of running shoes will not significantly attenuation least of 400km running distance.

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