sports bras

An improperly fitted sports bra is a common problem that leads to rubbing, excess bounce and pain in the shoulders or neck.

When your boobs are not supported correctly it can often look like they have a mind of their own, especially when it comes to high impact activities like running, HIIT or boxing. It is important that your sports bra makes you feel supported throughout all your activities. Many women often select sports bras based on comfort and softness, however this tends to lead toward styles which aren’t supportive enough for them. Even A and B cup women require support and less bounce as bounce leads to strain on breast ligaments and chafing. A supportive and correctly fitted bra will hold you in place thereby eliminating bounce, rubbing and friction.

Stop the Drop

Gravity and Intense workouts are not your friend unless you have the right sports bra.

Breasts are not anatomically designed to support themselves so they need help. Throw in a run in which your breasts can move up to 8-10 cm in a figure 8 pattern and it’s essential that you get a properly fitted sports bra (A 12B bust cam bounce up to 8cm while running) as this can help cut the bounce in half.

All breasts key support come from the Coopers ligaments which are the connective tissue which runs down the side of your breast and acts as a support and tone for your breast. This ligament can lengthen or weaken over time and good fitting sports bra can help maintain its condition. A proper fitting sports bra supports the breast in three key ways, the under band needs to be tight and gives 70% of your support needed. The internal cup acts to provide compression and support to reduce the drop. The front depth encases your boobs and ensure that all your tissue is held snuggly inside the cup. The straps act as a final support to help keep your breast tissue up and perky.

How to ensure you’ve got a great fit

The most important criteria to achieving optimal fit are the key fit areas; under-bust, over-bust breast, underarm, and straps.

All areas should be securely supported, yet not constricted. The wearer must be able to breathe comfortably. Under-bust should be tight and act as the main support for your breast (70%). Your straps should be firm but not dig in and should not support the weight of your breast. The top of your bra should lightly rest on your skin on your over bust as this is a common place for rubbing. The bra should feel snug, if you can lean forward and everything stays in place then you’ve achieved a good fit. All breast tissue should fit inside the bra - especially under the arm, there should be no gapping or overflow at the top or sides. When doing any high impact activity, the underarm should touch fabric not skin to reduce rubbing. Straps should be tightened to minimise bounce.

How to measure yourself

Get your under-band measurement:

Wrap a measuring tape around your ribs, just under your breasts. Make sure the tape is snug and parallel to the floor. Breathe in and out to ensure the tape is not too tight. Measure to the nearest 1/2 inch or centimeter. Record this measurement.


Second – You need your over-bust (cup) measurement:

Start at the center of your breasts and pull tape across your breast to under your armpit, be sure not to squish or pull to tight, keep the tape flush with your skin as you wrap the tape around your back to get the circumference. Now measure to the nearest 1/2 inch or centimeter. Record this measurement

How to pick the right sports bra

Own a variety of sports bras for different levels of activity.

When in doubt, choose a higher-impact bra for a lower-impact sport - not vice versa.


Get fitted by a Rockwear expert.

All our store team are qualified fitters and can assure you’ve got the right fit for you.


Before buying, jump around (like the song) to make sure your breasts fit snugly in the cups.

If there are adjustable straps be sure to adjust them so they are firm but don’t dig in. If a bra constricts your breathing, or bulges, ask to try on another size or support level. Many of our bras have removable cups try the bra with or without the cups to get a perfect fit. Also, if your sports bra has a hook and eye closure it should fit on the first hook; as it loses elasticity over time, you'll need room to tighten it.


Rotate your bras and wash them regularly

- to get at least one year's use out of each one approximately 50 washes.

Support Types

High, Medium, Light- What’s the difference?


High Impact


  • Thicker straps – To help support the weight of the breast
  • Increased front depth – To give more coverage and reduce bounce from the top down
  • Racer back construction – Provides more support and evenly distributes weight
  • Rubber in Arm hole – To support the side breast
  • Thicker under band – To give more support at bottom of breast
  • Cups – Push up or Soft cup depending on the style


  • High impact activities – Running, HIIT, Cross training etc.
  • Low impact activities for women with C cup +

Best for

  • Women who want to significantly reduce movement in their breast



  • Thin straps that have a support anchor – Often adjustable, with intricate strap details, with elastic or rubber in the straps for support
  • Lower Front depth – Gives less coverage on the top of the breast
  • Rubber in Arm hole – To support the side breast
  • Thicker under band – To give more support at bottom of breast
  • Cups – Push up or soft depending on the styles


  • Medium impact activities – Walking, biking, yoga, gym

Best for

  • Women who do not need as much support A-D cup who like the look of strappy details while getting moderate support

LOW Impact


  • Thin straps with open back – Very light and breathable
  • Low Front depth – Gives little coverage on the top of the breast
  • Thin under band – For lightweight comfort
  • Cups – Soft, push up or no cup depending on the style


  • Low impact activities – Yoga, gym, Pilates, mat work, stretching

Best for

  • Women who do not need as much support A-D cup and want a lightweight breathable bra that’s support comes from the active fabric

What if I am a larger cup size?

These women should look for a sports bra with significant adjustability and customization to assure comfort is achievable. Many of our bras have adjustable straps to allow the wearer to achieve a close to perfect fit and one which can be tightened or loosened depending on level of activity.

How often should I get fitted for a sports Bra

As women, our bodies change quite dramatically over a lifetime, before and after pregnancy, as we age etc. It’s important to get fitted every year to ensure you are getting the best fit and most supportive sports bra for your needs.

How often should I replace my sports Bra?

Your sports bra should never celebrate a birthday. All that sweating and washing breaks down the bras ability to do its supportive job. Think of your sports bra a piece of equipment that has a job to do, just like your running shoes that you change often you need to keep those bras' on rotation to ensure they give you the right support for their life.

How to care for your bra --Keep it clean, ladies

A good sweat sesh does wonders for your body, but for your bra? Not so much. Chemicals and salt in sweat break down elastane, making it more likely to droop under pressure. To extend the life of your bra launder it after every workout: machine wash on the gentle cycle in cold water with a mild laundry powder. Be sure to zip all zips and fasten all hooks on the bra to ensure they do not catch and tear the fabric. If your bra sticks throw a cap full of white vinegar in your wash to destroy that odour causing bacteria. In all our Rockwear sports bras we use fabric that pulls moisture away from your body to help keep you dry, avoid the use of fabric softener when washing as this reduces it’s ability to pull the sweat off you. To dry, always hang it up or lay it flat; dryers ruin elastic

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