...时脚与地面接触的过程可分为以下三 个阶段：一、脚跟著地 (heel strike)；二、脚底贴地 (feel flat)；及三、脚跟离地 (heel off)。
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保持前面小腿垂直地板，后膝伸直，后脚跟离地，胸腔上展。
Keep your front shin vertical, back knee straight, back heel lifted, and chest lifted.
重要提示：即使脚跟离地时，双脚的指尖绝对不能离地。
TOP TIP: the toes on both feet should never come off the floor, even when your heels do.
跑鞋比步行鞋更需要脚掌的灵活性，以承受运动中脚跟快速落地和脚趾突然离地的动作。
The soles of shoes need more than walking shoes flexibility, to withstand the fast landing heel and toe movement from the ground suddenly action.
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