Sports Bra Support Levels, Explained

Most sports bras are sold on a label that says low, medium or high support, and almost nobody explains what those words mean. Buy the wrong one and you either get no support or you spend an hour in something that feels like a compression bandage. Here is the plain version.

What the three levels actually mean

Low support is for activity where your feet stay on the ground: yoga, pilates, stretching, walking, weight training that does not involve jumping. These are usually pull-on styles with light or no padding. They feel like nothing, which is the point.

Medium support covers most people for most sessions. Weight training, cycling, elliptical, most classes, general gym work. This is the level to buy first if you are only buying one, because it handles the widest range of what people actually do.

High support is for running, HIIT, jumping, football, padel — anything with repeated impact. You will notice a wider band, thicker straps, and often adjustable hardware. It should feel firm without restricting your breathing.

The band does the work, not the straps

This is the single most useful thing to know. Around 80 percent of a sports bra's support comes from the band around your ribcage, not the shoulder straps. If you are pulling the straps tighter to get more support, the band is too loose and you are about to give yourself shoulder and neck ache.

A good band sits level all the way around, does not ride up at the back when you raise your arms, and you should be able to slide two fingers underneath it — no more.

How to test the fit in two minutes

• Jump. Ten star jumps. If there is noticeable bounce, go up a support level, not down a size.
• Raise your arms overhead. The band should stay put. If it climbs, it is too loose.
• Check the cup edges. Any spilling over the top or gapping at the sides means the size is wrong.
• Breathe deeply. Firm is correct. Restricted is not.
• Run a finger under the band and straps. Red marks after a few minutes mean it is too tight.

Three common mistakes

Buying your everyday bra size. Sports bra sizing rarely matches lingerie sizing. Check the brand's own size guide every time.

Wearing it too long. Elastane degrades. A sports bra you wear twice a week is usually past its useful life in about a year, and the support goes long before the fabric looks worn.

Washing it hot and tumble drying it. Heat is what kills elastic. Cold wash, air dry, and it will last twice as long.

If you are buying one

Get medium support. It covers most training, it is comfortable enough to wear all day, and it is the level you will reach for most often. Add a high-support bra later if you start running or playing regularly.

You can see the full range in our sports bras collection, and several come as part of a colour-matched set with leggings cut from the same fabric.