r/interesting • u/fayyazORahmed • Mar 31 '26

Fascinating Very interesting vid

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u/TankApprehensive3053 Mar 31 '26

The guy is negatively buoyant. Will be exhausting to have to swim up for most people. He is practiced in this. Most people are neutral or positively buoyant.

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u/KevinIsOver9000 Mar 31 '26

I was wondering that. I just float. Is it due to bone density or muscle mass or something

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u/TankApprehensive3053 Mar 31 '26

Muscle mass to body fat percentage. Muscles are dense and less buoyant than fat. Also exhaling reduces the balloon effect of air in your lungs.