I've been there. Swam competitively all through highschool... was never a big guy, but no fat either. Couldn't float back then, not enough fat.
Since I went from 150-190, swimming is entirely different. I still can't float, but man do I feel powerful in the water. I can't match the times I swam in HS (not even close, actually), but then I'm not swimming 2-4 hours a day, either. Still, the feeling of just tearing through the water is something I never had when I was small.
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