Your First Sports Bra, Choose Support and Check the Fit

Start with the movement in your workout

Use these as starting points for trying bras, rather than fixed rules for every body.

• Low support. Start here for yoga or walking.
• Medium support. Try this for weight training or the elliptical.
• High support. Start here for running or sessions with repeated jumps.

A fuller bust may need more support even during gentle activity. These are activity-based suggestions from Gymshark, not a rule that one cup letter always needs one tier. For a session mixing lifting and jumps, shortlist for the jumping part first.

Choose how you want to be supported

The illustration shows construction differences, not verified support ratings.

Compression holds breasts toward the chest. Encapsulation supports each breast separately in cups. Combination bras do both. Compression is not automatically limited to gentle workouts: REI also describes adjustable versions offering medium to high support.

Try separate cups if you dislike a flattened feel; compare combination designs when you want both separation and compression. Check the particular bra's intended activity before choosing by construction alone.

Measure for the product's own size chart

Use a soft measuring tape to measure just below the breasts and around their fullest part, following the brand's instructions. A tape you already own is enough. Match both measurements to the product's chart; adidas uses several size systems, including letter sizes with cup ranges.

Keep the band number and cup letter together when comparing sizes. The same cup letter does not represent the same volume across different bands, as Brooks explains.

Let the fitting check decide

Settle your breasts into the bra, then work through these checks.

• Band and straps. The band stays level; straps neither slip nor dig in.
• Cups. Look for full containment without overflow or empty gaps.
• Movement. Raise your arms, twist and jog in place. Some movement is normal; uncomfortable bouncing or rubbing means this candidate needs adjustment or replacement with another fit.

These checks follow adidas's fitting guide. You must also be able to breathe deeply and comfortably, as REI advises. Do not keep tightening until movement disappears.

Buy the fit that works, then compare price

Keep candidates that suit the activity and pass the fitting check. Compare their prices and the seller's try-on and return conditions before ordering.

Try putting the bra on and taking it off, too. If an overhead style is awkward, Brooks suggests back closures or a front zip. If sizes keep failing, ask a specialist fitter before buying several compromises.

Choosing leggings for the same workouts next? See how nylon and polyester leggings differ.