Running is actually a series of jumps, and so it affects the female body the same way that jumping does. And running makes breasts move in surprising ways: up and down, but also sideways. They move more than you do: run a marathon and your breasts will have run an ultra. Researchers at Portsmouth University’s Research Group in Breast Health (RGBH) have calculated that the movement of the breasts during exercise ranges from 4cm during a walk to 15cm during a run.
How can you reduce pain?
Make sure you are wearing the right fit and style for your activity. The most common mistake is to wear the underband too loose and the cup size too small.
Find more information on how a sports bra should fit in our guide here.
What style of sports bra is best?
I often hear that compression-style sports bras are better suited for women with smaller breasts but I'm a F cup runner and I always wear the Enell SPORT which is a compression style. Often accused of providing a "uni-boob" shape since they support by pressing down on the boobs.
Encapsulation bras lift the breasts and each one is individually supported, they provide a more natural overall breast shape as compared to compression sports bras. Try the Freya which has breathable spacer fabric moulded cups to give you a great shape.
How to find the best running bra for you
When first purchasing a sports bra, look for bras with high-support elements such as molded cups, wide bands, padded straps and multiple hooks.
If a bra is not comfortable to wear walking and stretching, then don't even think about hitting the road with it.
The band: It should be made of wide elastic material so it can support your breasts without causing back bulges or riding up when you lift your arms. You should fasten the bra on the loosest hook so, as it ages and becomes looser, you can tighten the fit.
The shoulder straps: They should be wide and padded so they don’t dig into your shoulders.
The cups: To limit movement, the cups must completely cover your breasts (without leaving any creases or gaps). Keep in mind your running bra cup size may be different from what you wear under your little black dress.
The underwire: It should sit on your ribs so it doesn't dig into your breasts or the tissue under your armpits.
The front band: The centre of the bra should sit on your breastbone, squarely between your breasts.
- Here's our pick of high impact sports bras for runners with large breasts
- Sign up to receive our Boobilicious emails and be the first to hear about VIP discounts and new products.