Exercise makes your breasts bounce, thus straining and stretching the supportive ligaments. The heavier the breasts, the bigger the bounce. Make sure your sports bra is supportive enough to stop excessive movement.
Product treatments: Sorry ladies, no miracle creams will boost your bust, so don't fall for gimmicks, tempting as they may be. Breast ptosis is caused by a loosening of the surrounding ligaments, and they can't be lifted just by tightening the skin.