Answer (1 of 5): 100% yes. When you work out you're burning body fat, which is what breasts are made of. I've seen some pictures (that I wish I hadnโt seen) of super muscular women, and they barely have any breasts at all. They look like they have a manโs chest.
Will running reduce the size of my boobs? - Quora
Why are British women's breasts getting bigger?, Women
Why are my breasts saggy at just 18? I'm a size 34DD. Is this size just going to sag no matter what or can I make them perky? - Quora
How can yoga help increase your breast size? - Quora
Diaphragm birth control: Use, advantages, and risks
How to reduce my man boobs (gynecomastia)? Does doing push-ups or skipping make the condition worse or not - Quora
Exercises to reduce breast size: 7 exercises to reduce breast size
Are 8 Out of 10 Bra Wearers Really Wearing the Wrong Size?
What is the best treatment for cellulite?