the bounce test
A sports bra says it's "high impact". But what does that actually mean?
For most sports bras, it's just a marketing term. There's no regulation to it - any bra can use it. No bar to pass. No proof required.
For us, it's science. Because you can actually measure bounce. So we did.
The Research Group in Breast Health at the University of Portsmouth are the world's leading independent experts in sports bra testing. Using a specialist motion capture system, they precisely measure how much breasts move while running on a treadmill.
Because for runners, this stuff really matters. Poor support is uncomfortable, affects your performance, and can cause lasting damage to breast tissue.
So we put the Gravity Sports Bra through its paces to prove how it stops all of that.
The results? Real data. Independent proof. The scientific case for how Gravity is the best sports bra in the world.
Testing is conducted independently and methods are confidential.
The videos on this page are for representation only.
before
Your boobs don't just bounce. They move in a figure of 8.
Up and down, side to side, backwards and forwards - all at once. And yes, it happens no matter what size you are!
Testing begins by measuring breast movement with no bra (eek!). This gives the baseline data needed to calculate exactly how much the Gravity Sports Bra reduces movement.
after
The Gravity Sports Bra significantly reduced breast movement. 81% less movement to be precise. That's scientifically proven support that actually works.
All bras tested at the University of Portsmouth are anonymously ranked and categorised by performance level. Out of 435+ bras tested to date, the Gravity Sports Bra ranks No.1 for overall reduction of breast movement.
ranked no.1 for movement control out of 435+ sports bras tested.
The Results
Ranked the best sports bra overall, Gravity delivered top-tier performance across every category tested.
90% less
SIDE TO SIDE
MOVEMENT
80% LESS
UP & DOWN
MOVEMENT
74% LESS
FORWARDS & BACKWARDS
MOVEMENT
81% LESS
MOVEMENT
OVERALL
