Heel strike 足跟着地 ; 脚跟着地
People with flat feet usually have flexible joints that cause their ankles to roll too far inward at heel-strike.
平足的人通常有灵活的关节，这导致他们的脚踝在脚跟踏地的时候过度的向内翻转了。
By landing on the middle or front of the foot, barefoot runners have almost no impact collision, much less than most shod runners generate when they heel-strike.
用脚的中部或前部着地，赤脚跑步者几乎没有冲击性碰撞，冲力比大多数穿鞋跑脚跟着地产生的小很多。
Even elite runners have a variety of styles. Some strike the ground with the heel, others with the midfoot. Some look elegant, while others look awkward and clumsy.
甚至跑步精英们有着各种各样的风格。一些人用脚后跟触地，另一些人则用中足触地。一些人看起来很优雅，而另一些人则显得笨拙。
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