Monitoring Your Boob Bounce

(Image courtesy of Freya Active)
(Image courtesy of Freya Active)

Who knew there was a study going on monitoring how much your boobs bounce when you move around!

After testing the movement and strain on breasts while running, the University of Portsmouth has provided an accurate look at where breasts need support during exercise. Freya teamed up with the university to test exactly where and how much breasts bounce during a tough workout focusing on 19 areas of the breast.

Before now, sports bra testing commonly focused only on breast movement reduction (known as breast bounce) and monitoring only one area of the breast (a marker on the nipple).

Thirty-six women with varying bra sizes ran on a treadmill with the breast markers tracked by a high-speed camera system to measure breast movement, velocity, acceleration and breast strain. The women ran first without a bra, then in a t-shirt, and finally in a range of sports bras.

The new Freya Active sports bra topped other styles at providing reductions in strain around the center and base as well as upper pole areas of the breast. Testing on Freya’s supportive Active Underwire Crop Top Sports Bra showed some great results. Get your own here:

“Breast strain may occur during exercise when the breast is not supported correctly and there is tension on the ligaments and skin of the breast,” Dr. Joanna Scurr, a specialist in breast health from the University of Portsmouth, said. “Over time this may lead to a stretching of the breasts natural support, which could lead to permanent breast damage.”



  • The new Freya Active sports bra reduces strain to just 3% in the inner region of the breast, compared to 28% in an everyday bra.
  • The new Freya Active sports bra reduces strain at the nipple to 1%, reducing potentially damaging levels of strain at the center of the breast.


  • The new Freya Active sports bra reduces pain by 97%, while an everyday bra reduces pain by only 58%.


  • Testing found the new Freya Active sports bra reduces independent breast movement. 92% of participants in testing felt no independent breast movement wearing the bra.
  • It was more effective at reducing forwards and backwards movement in the upper section of the breast than other sports bra styles in the study.



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