eli5: How come gorillas are so muscular without working out and on a diet of mostly leaves and fruits?

Question

eli5: How come gorillas are so muscular without working out and on a diet of mostly leaves and fruits?

In: Biology

Answer 1

The question ~~actually~~ should be, ‘Why don’t humans look all buff like many mamnals, to which the answer is that we developed the ability to adapt to our physique by growing muscle through constant exertion, and losing it during periods lacking constant exertion. This enables us to be more efficient, better survive periods of famine, and eventually led to developing a lot of skills because we don’t have to spend all day eating.