Should You Wear a Sports Bra All the Time? Pros and Cons

When comfort became a priority during the pandemic, sports bras quickly became the go-to choice for many. In fact, sports bra sales made up more than a quarter of total bra sales by 2018, according to market research. And they're not just for the gym anymore many people wear them at home, while running errands, or even to work.

But is it safe to wear a sports bra all the time? Some concerns have circulated about potential issues like sagging, breast pain, and even cancer. Let's separate fact from fiction and find out what really happens when you live in a sports bra.

Common Myths About Wearing a Sports Bra 24/7

Before we dive into potential downsides, let’s clear up some misconceptions:

Myth 1: Sports Bras Cause Breast Sagging

Actually, the opposite may be true.

Your breasts are supported by Cooper’s ligaments, which act like natural rubber bands that help maintain shape and lift. Over time, these ligaments can stretch, leading to sagging.

"Theoretically and logically, wearing a supportive sports bra may actually help prevent sagging," says Roshani Patel, MD, breast surgical oncologist at Dartmouth-Hitchcock. "However, there’s no clinical data proving this."

Wearing a well-fitted sports bra may provide better support than traditional bras, helping to reduce stress on these ligaments.

Myth 2: Sports Bras Cause Breast Pain

A properly fitting sports bra should not cause pain in fact, it may reduce discomfort.

"Many patients who see me for breast pain switch to wearing a sports bra because they feel they have better support," Dr. Patel says.

Pain is more likely if your sports bra is too tight or doesn’t provide enough support. If your breasts feel sore, it might be time to reassess your size or switch to a different style.

Myth 3: Sports Bras Can Cause Breast Cancer

This myth has been completely debunked.

There’s no evidence that wearing a sports bra all the time increases cancer risk. "Wearing a sports bra does not compress the lymph nodes or cause cancer," Dr. Patel says.

In fact, compressive bras are sometimes recommended for breast cancer patients post-surgery to help reduce swelling.

The Downsides of Wearing a Sports Bra Constantly

While sports bras don’t cause sagging or cancer, they can lead to skin issues and other concerns if worn too often.

1. Skin Irritation and Breakouts

Sweating in a sports bra and not changing afterward can trap bacteria, salt, and moisture, leading to rashes or acne.

"Mineral salts left behind by dried sweat can be irritating to the skin," says Teo Soleymani, MD, dermatologic surgeon at UCLA Health. This can cause acne mechanica (breakouts caused by heat and friction) or irritant dermatitis (a rash from rubbing).

How to prevent it:

• Change your sports bra after sweating.

• Wash it regularly, especially if it smells.

• Opt for moisture-wicking fabrics or 100% cotton if you have sensitive skin.

2. Problems for Breastfeeding Parents

A too-tight sports bra can put pressure on milk ducts, leading to clogged ducts or mastitis (a painful infection).

"If a sports bra fits properly, it can be worn all day," says Leigh Anne O’Connor, International Board-Certified Lactation Consultant, "but avoid wearing it while sleeping."

What to do instead: Look for breathable, nursing-friendly sports bras with adjustable straps and front flaps for easy breastfeeding.

3. Discomfort if Worn to Bed

Wearing a sports bra to sleep isn’t necessarily harmful, but it can increase the risk of rashes and fungal infections if you’re wearing the same one all day and night.

Dr. Patel recommends switching to a sleep bra or a lightly compressive camisole for better comfort.

How to Find the Right Sports Bra for You

A well-fitted sports bra should provide support without excessive compression. If your bra is too tight, it could cause red marks, chafing, or discomfort.

According to Breast Research Australia, these are signs your sports bra doesn’t fit properly:

• The straps dig in or fall off.

• The band rides up in the back.

• Your breasts bulge out of the cups.

• The fabric is wrinkled, indicating the bra is too big.

• You experience bouncing or pain during activity.

If possible, visit a professional bra fitter or use Breast Research Australia’s interactive sports bra sizing tool to find the best fit.

The Bottom Line

Unless you’re breastfeeding or have sensitive skin, it’s not harmful to wear a sports bra all the time as long as it fits properly and you practice good hygiene.

"If you wear it all day long and love it, then rock on!" Dr. Soleymani says.

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