system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't obese people's muscles stronger than average, considering they carry around so much weight every day?

I am sure there's some wrong with my thinking, and I'd like to understand what. I think it is a fact that the more you exercise a muscle, the stronger it becomes. Let's assume we have one obese person, and one person of healthy weight. Both of them walk 1h per day over the same distance. Since the obese person carries around so much more extra weight, can't we assume they are straining (training?) their leg muscles more by the additional effort required, making them stronger in the process?
gpt
They generally are.  For pretty much exactly the reason you said.

Maybe you're conflating muscle definition (i.e. the muscles you see on body builders) with muscle strength.  A quick look at Olympic weightlifters will show you where strength actually lies.  None of them look like bodybuilders.