Wear the correct style sports bra.
Just like impact level the style of your sports bra can affect your chance of chafing. When selecting a style of sports bra, you should consider the following.
Underwired or wirefree?
Many women get chafing from their underwire. This can be solved by correct fitting cups (see size advice above). If this does not solve the issue, then try wire free cups. Take the underwire away and fingers crossed you take the problem away.
Modern designs put wire free on par (or slightly above!) with underwired in terms of support. So, give wire free a go, your breasts will thank you.
Band size and structure.
Look for a sports bra with a firm, wide, seam free under band. It is common for sports bras to chafe around the band. This is most commonly due to the band being too loose (and thus moving) but can also be caused by unnecessary seams or an unpadded clasp at the back.
Look for a style with a wide, seam free band that has adequate padding under the back clasp. It should fit comfortably tight to prevent it moving. And yes, you need a clasp back as it allows you to adjust the band as it stretches over time. Again, no crops people!
Cup size and structure.
Just like the band, incorrect cup sizing can also cause chafe. Cups too small and your breasts can spill out or even worse squash together (and rub!). Cups too big and we are back to breast movement causing rub. Refer to my size advice above and make sure you are wearing the correct cup size.
Another common rub area is between the breasts. Many crop style bras compress or ‘squash’ the breasts together. A prime cause of breast chafe!
Look for a sports bra with structured cups that ‘encapsulate’ each breast individually. This separation of the breasts will reduce the chance of the breasts rubbing against each other.
Beyond this, look for soft, seam free cups.
Shoulder straps are another (less common) chafe point. Once again due to unnecessary movement.
Make sure they are correctly adjusted before every wear. If you still find they rub, then try a different back style. Racerback sports bras hold the straps closer to the shoulders which can reduce strap movement.
Go for a lightweight style.
Sweat and rub often go hand in hand and Australia is a hot place. As such, consider a lightweight, moisture wicking style.
Many modern sports bras are made from technical fabrics that help wick moisture away from the skin. Helping to keep you dry. You may pay a little more, but the extra investment is worth the money if it helps keep chafe at bay.