why do our muscles stop growing at a certain point, why can’t we constantly workout and keep growing them?
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Humans evolved to have our muscles break down relatively quickly when they are not in use. This is believed to have helped our ancestors survive when food was scarce, since maintaining muscle tissue is calorically expensive. Working out tells our body that we need more muscle by lightly damaging the muscles we do have, so it does its best to repair and build more muscle. Eventually you reach a point where your body is only able to build muscle at a rate equal to the rate it is breaking down, and you can’t gain more muscle. Exactly where this point is is based on how your body is put together; your heart, lungs, digestive systems, etc. are only so big and able to supply your body with so much energy.
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