> I’d imagine a foot to same foot distance is sufficient to solve for speed. There surely must be an assumption about leg length, and that the person wasn't ju

> I’d imagine a foot to same foot distance is sufficient to solve for speed. There surely must be an assumption about leg length, and that the person wasn't just playing some hop-scotch style game with long, slow, bounding strides. I think I'd need quite strong evidence to convince me that ancient humans were as fast as someone with modern nutrition and training. Especially as (unless I'm mistaken) there's no indication that people in hunter gatherer lifestyles today are particularly fast.