I think they just look like that sometimes.
I believe I read somewhere that animals don’t need to exercise to have strong muscles. Human evolution on the other hand, prioritised endurance over strength. So when tigers or chimpanzees eat, the calories are used for muscles while humans have to actively exercise to get the same result.














Yes that goes without saying.
But we won’t see a gorilla being more active than necessary for gains. That’s what I was trying to say.
One reason why I didn’t go to any zoo in Japan while visiting.