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Causes of Pain in Large Breasts While Running

by
author image Rachel Moran
Rachel Moran started writing in 2003. Her journalism has appeared in "Orange," "Luxury," "Creative Loafing," "tbt*" and other publications. Her fiction has appeared in the "Tampa Review," "Florida Review," "BLOW" and "Pindeldyboz." Her copywriting has served clients from Bayer to Volkswagen. Moran received her Bachelor of Arts in writing from the University of Tampa.
Causes of Pain in Large Breasts While Running
A woman is running on the beach wearing a sports bra. Photo Credit AlexZabusik/iStock/Getty Images

Large breasts present a challenge for runners, but ways exist to stop the pain associated with bouncing, chafing and muscle tension. The same rules of physiology -- or how your body functions within its environment -- apply to all women, but since you carry around extra mass and weight, side effects like pain are more likely to occur. Try a few simple ideas to lessen pain and focus on your workout.

Physics

The simplest source of pain when you run is your breasts' weight. If you wear a D cup, your breasts may weigh between 15 and 23 pounds, which strains your chest, back and shoulder muscles. The more complex pain source is force. Newton's second law of motion is that force equals mass times acceleration. According to biomechanist and bra engineer Julie Steele, the mass of your breasts and the acceleration from running creates a force that can be very painful.

Back Exercises

Large breasts usually cause pain two ways. Repetitive stress injures the upper and middle back, and many women with large breasts develop poor posture, which causes spinal pain. Strengthening your back muscles can help mitigate this pain. Perform about 15 minutes of daily back exercise, including knee-to-chest and rotational stretches, the bridge pose and shoulder blade squeezes, to prevent or heal back injury.

Sports Bra

A high-quality sports bra may be your greatest running buddy. Look for one with a high level of compression; that often means you can't stretch it over your head. The material of the cups, sides or wings and back should not stretch either. Test the fabric for resistance with your hands before trying the bra on. Reinforced fabric is even better. The silhouette should include wide bands and full-coverage cups to support your breasts adequately.

Chafing

Chafing, or irritation from friction between your bra and your nipples or skin, presents a potential pain for all runners. Large-breasted women may be more prone to it because of the area of skin in contact with fabric and the potential for fit issues with clothes or bras. A good sports bra should solve a chafing problem, but sometimes it does not. Fitness coach Levi Bloom recommends nipple guards. He uses medical tape, but bandages over the nipples work too.

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