Eli5: how are humans, who are two legged, able to out endure creatures that are four legged?

Question

Eli5: how are humans, who are two legged, able to out endure creatures that are four legged?

In: 1455

Answer 1

I saw a video a while back that basically said that each step for a human is just a controlled fall, which uses less energy than quadrupeds who have to use their limbs in unison to stay upright.