Eli5: can my boobs get floppy from running without bra?
In: Biology
No. Sports bras are compressive because it can be uncomfortable to run/exercise with unsupported breats, not because boobs are made of silly putty thay stretches with every bounce.
Breasts are made of mostly fat and connective tissue surrounding mammary glands. The level of sag mostly has to do with age and genetics.
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