A Good Sports Bra Matters for Many Reasons

One limitation of the study is that it’s too small to be representative of all recreational runners, the study team notes. It’s also unclear whether the results would apply to women who have avoided running due to breast pain but want to try again with a more supportive bra.

Even so, the results should serve as a reminder to female runners to think carefully about how their bra might impact their workout experience, says Nicola Brown, an associate professor of female health and performance at St Mary’s University Twickenham in England.

“If breasts are not appropriately supported they can move independently from the body during exercise,” says Brown, who wasn’t involved in the new study. “This movement can alter running mechanics, muscle activity, breathing frequency, perceptions of effort, and can deter women from exercising due to pain or embarrassment.”

Tips on How to Buy a Sports Bra That Fits Right

To get a good fit on a sports bra, women should look for a firm band under the breasts that sits level around the body without any gaping or puckering of the cups or breasts spilling out of the cups, Brown advises. It’s easier to get a good fit when it’s possible to adjust both the band and the straps, Brown adds.

“It is a good idea to try on your sports bra and have a jump around in the fitting room to check if it is supportive enough and feels comfortable,” Brown says.

And even when you find the perfect fit, it’s important to know the best sports bra won’t keep its shape forever, Brown adds. “If you feel your breasts moving excessively during exercise, or experience any pain or discomfort during activity this suggests that your sports bra may not fit properly or may need replacing.”