Sleep Underground

Does Sleeping on Your Stomach Flatten Your Breasts?

Many people know that sleep has a huge impact on our health as human beings. However, what many people wonder is how many parts of our lives sleep truly impacts. One of the most common questions that women have when it comes to sleep is whether the position that you sleep in will affect your breast size. More specifically, they want to know if sleeping on your stomach will actually decrease breast size. This, whether you’re using one of the best sleep bras we reviewed.

At its surface level, this would seem to make sense. Sleeping on the stomach should compress the breasts, right? Well, it’s just not that simple. In fact, there are a variety of factors that will lead to affecting breast size and shape. However, is sleep really one of them?

In this overview, we’ll provide you with the knowledge that you need to determine the best sleeping position for you and finally, once-and-for-all, answer the question about breast size and sleeping on your stomach, whether you’re wearing your bra to sleep.

Sleeping Position Doesn’t Matter When it Comes to Size

If you are a belly sleeper, then you’ll be happy to know that what position you sleep in will not directly affect the size of your breasts. Your breasts will not decrease in volume when you sleep on your stomach, as some would have you believe. In fact, you can sleep on your stomach as much as you desire, and the volume of your breasts will not change.

Nor will sleeping on your stomach affect the health of your breasts when it comes to the risk of breast cancer and other diseases. With all this in mind, you will be empowered to sleep on your stomach whenever you desire without fear of repercussions on your breasts.

Effects of Sleep on Your Breasts

Though there is absolutely no data or information that would suggest that sleeping on your stomach reduces the size of your breasts, that does not mean that sleeping on your stomach is without consequences. In fact, there are some undesirable consequences of sleeping on your stomach that may motivate you to avoid sleeping on your stomach. Here are some of the possible effects of sleeping on your stomach and the impact that they can have on your breasts.


People that sleep on their stomachs tend to have worse posture. This can mean that it becomes hard to maintain posture throughout the day. As a result, you may see that your breasts look less desirable. Part of keeping up a good look for your breasts is maintaining good posture and keeping your back straight. When you sleep on your stomach, you could reduce your ability to achieve this over the long-term.


Another potential side effect of sleeping on your stomach is the back pain that is sometimes associated with stomach sleepers. Those that sleep on their stomach will find that they are more at risk for this type of pain. This doesn’t have anything to do with your breasts or how they look, but it could affect your life in more severe ways.

Matt Pulnett
Matt Pulnett is an experienced sleep expert and mattress enthusiast who has been writing about the importance of sleep and the best sleep products for over 10 years. He is a recognized sleep expert and has been featured on many of the top websites and magazines devoted to sleep and mattresses.
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