pronation

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If it shows the entire sole of our foot with little to no curve on the inside, it means you have low arches or flat feet and tend toward over-pronation (your feet roll inward).
如果脚印描出你的整个脚底，内测几乎没有任何曲线，就表示你的足弓较低或属于扁平足，倾向于过度内旋（你的脚往内翻）。
For your longer runs, however, stick with motion control shoes, because your biomechanics are more likely to break down, and you'll be happy you have the added pronation control.
不过对于长跑，你还是需要控制型跑鞋的，因为你的生物力学特征更倾向于压坏（你的脚），同时你会高兴的发现增加了对跑步翻转的控制。
Also, at the end of the article, we explain Pronation--a biomechanics term that often confuses runners.
在文末，我们还将解释一个困扰许多跑步者的生物力学名词——“脚内翻”。

Pronation and plantar fascitis seem to disappear when you start using your feet the way they were designed to be used.
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These help to keep your wrists in a neutral position by preventing under or over pronation -bending them too much up or down.
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rotation of the palm of the hand or sole of the foot so the inner part faces down