Maybe i am wrong, but everytime i see videos with cougars or gorillas they looks like Mr.Olimpia competitors
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Muscles grow in response to exercise, but it’s not like exercise actually powers muscle growth in any way. It’s just your body deciding to grow more muscle. But the “decision” of how much muscle to grown is a combination of environment, behavior and genetics. Some species naturally have more muscular physiques, meaning their bodies grow larger muscles by default, even without exercise. It’s simply encoded in their DNA that they are more muscular.
Muscular animals have to be muscular to survive in their ecological niche. Gorillas have to climb trees and possibly fight each other. Cougars have to run fast and kill their prey. We humans, in contrast, rely more on our intelligence and ability to craft and use tools, so we don’t need to be very muscular by default.
That’s not to say we have no physical prowess, though. We *are* built rather well for endurance running, and thus for persistence hunting. We have a great ability to cool ourselves down by sweating, whereas many other animals overheat if they run for a long time. We have achilles tendons that act like springs that store and release energy, which allow us to run faster and more efficiently. We have a nuchal ligament in our neck that stabilizes our head while running. And we (obviously) run on two legs, which is slower but more efficient than four-legged running.
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