I’ve heard a 60lb. monkey can lift up to 500lbs. Why is that? Most other animals have different body structures to explain their physical feats, like the woodpecker mentioned on the main site, but don’t monkeys have a body structure very similar to us? What’s the factor involved here?
Trees.
You don’t live in them. Monkeys do.
I mean the actual physical explanation, not the reason the monkeys developed them.
This site has an explanation of chimpanzee strength to illustrate a basic physics lecture. The explanation is about halfway down the page.
They only are for “certain” moves/motions. A Human in good shape is stronger than a monkey. Your legs are stronger, for example.- and you are MUCH faster.
Primates have better msuscles than the other mammals, by&large. Pound for pound, a human athlete is stronger than a Carnivore for example.
But is he stronger than an athletic carnivore? 
:rolleyes:
Human arms are leveraged for speed, monkey arms are leveraged for strength. A chimp might outlift you, but it isn’t going to have much ability to throw a spear.