I knew that they were supposed to be strong for their size... but wow, I wasn't aware that their arms were actually this big and strong looking:
Anyway, yeah, they have some big arms and they are pretty ripped for not working out and it's amazing considering what they eat compared to what bodybuilding humans eat. But having said that, their arms aren't any bigger than some humans out there. There are some pretty big humans.
So what gives? Why are they so strong? Some humans have more muscle mass for their size than these chimps do, yet chimps are still much, much stronger for their size. Is there something different about their muscles? If so, what?
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