Buy Sports Bra -

: Back closures (hooks) often allow for more adjustability as the bra stretches over time, while front-zip versions can be easier to take off after a sweaty workout.

Once you have a bra, use these tests from REI and other experts to ensure it works: buy sports bra

: It should sit level across your back. You should be able to fit exactly two fingers between the band and your skin. If it rides up when you lift your arms, the band is too big. : Back closures (hooks) often allow for more

Choose a bra based on how much "bounce" your activity generates. If you have a larger bust ( If it rides up when you lift your arms, the band is too big

: These should not dig into your shoulders. Use the two-finger test here as well. Adjustable straps are highly recommended for a custom fit.

: Wrap a soft tape measure around your ribcage, just under your bust. According to Market Union , if the number is even, add 4 inches; if odd, add 5. Bust Size : Measure around the fullest part of your chest.