[Chocaholic]

And then we invented weapons. As soon as we realized we were the only species that could accurately throw/launch things it all changed. It's that discovery that makes us the ultimate preditor, not long distance running. Because its been a million years or two since that time, it's likely that evolution has caused changes leading to the injuries George describes above.

So...just because Homo Erectus may have run down his prey, it's not advisable for modern man to try running down a mountain lion or wild boar. But, some will, of course.