To Raichlen's surprise, previous calculations of Laetoli footprint depths closely matched the even heel and toe depths left by people walking in their usual fashion.

令瑞奇兰惊讶的是，先前对于拉多里脚印深度的计算甚至与人们以正常方式行走时留下的脚跟和脚趾深度密切匹配。

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And finally here is the bipedal version of BigDog that walks heel-to-toe just like humans do.

最后我们这里还有一个两足版的“大狗”，它可以像人类一样利用脚跟和脚趾来行走。

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Take that misplaced center of gravity and put it into running shoes, which naturally tip you forward with a heel higher than the toe, and your feet and ankles start to bear the brunt of any impact.

穿上跑鞋并且重心不对，都会导致你脚跟高于脚趾，这种往前倾斜的状态让你的脚和踝关节开始忍受首当其冲的冲击力。

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Balance: Standing on one foot, walking heel-to-toe and standing up without using your arms can help improve balance.

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