The Research BehindEvery Girl in the Game.

The anatomy of breast support

Breasts have no muscle of their own — they're supported only by skin and the delicate Cooper's ligaments. During activity, that tissue moves in every direction, and once those ligaments stretch, they don't bounce back.

☝️ Tap each item below to highlight it

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  AreolaThe light pink ring surrounding the nipple. Used as a landmark in biomechanics research to track breast motion.
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  NippleThe dark pink tip at the center. Researchers measure its displacement to quantify breast movement during exercise.
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  Cooper's LigamentsThe connective tissue strings — the breast's only internal support. Once stretched, they do not recover.
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  Breast Tissue (Lobules)The glandular structures that drive most breast movement — up to 19cm of displacement without support.
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  Fat TissueLight and dark blue areas surrounding the breast tissue. Determines shape and size, and contributes to movement.

That's exactly why a well-fitting sports bra matters — and why we built our POWERFUL curriculum around it. Our free, SHAPE-standards-aligned lessons for grades 4–12 give girls the knowledge and confidence to understand their bodies, find the right fit, and keep moving.