system
Given the following post, respond as if you're commenting on Reddit:
human
[General Super Strength] Why don't more heroes with super strength weight train?

Now I know not all heroes have their powers from the same source right, but lets start with Mr Incredible.

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We see him at first in what I assume is his prime, he is thin, toned and very strong. We do not see enough of his powers here though to make a comparison of his raw strength then, pre mirage and post montage.

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We do know that he can get more fit, and more specifically stronger through lifting "weights" or trains whatever. So I wonder if there is an upper limit on his power, or what his upper limit would be if he really trained for many years like weight trainers do.

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So moving on from this I wonder about Superman. Lets use man of steel supes as an example, he is big and strong and looks like he lifts (cos he does) but we don't see Mr Kent in universe actually working out, his power comes from earths atmosphere (lets leave the reasons the other kryponians are as strong as someone who has lived on earth all his life to one side for now), would Superman be able to get bigger, stronger, more fit if he built his own gym out of meteors or like something?

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What about Captain America? I feel as though he could get even stronger, that one is pretty obvious.

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Anyone chime in here?
gpt
Just because they have super strength does not mean that it can be further augmented through training. In Superman's example, his strength frankly doesn't come from his muscles, but rather through whatever mechanism that sunlight exposure grants him power. When depowered, he doesn't lose musculature, just that enhanced strength.