今天剛好適逢段考，不過原本星期四就沒有第八節所以可以提早離開學校。看了三分之一的"跑步該怎麼跑"最近剛好開始講到"姿勢跑法"的開頭，裡頭提到要用前腳掌的"蹠球部"去踏地，之後又要馬上彈起來，裡面有提到一個重點就是把地吸引力的位能轉變為動能，減少身體晃動所做的虛功。書上說專業跑者的上半身幾乎是不晃動的。所以我今天去跑的時候，刻意用"蹠球部"去踏地面，得到的效果是，小腿很快疲勞也許我還沒完全體會。跑去程時，有上坡而且覺得起跑時有比較慢，花了20分完成。折返回程時，有下坡而且覺得有跑比較快，僅僅只快了1分。總之，這段練習還沒突破自己的前次記錄，還需要再多加練習。

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