Another fairly popular fallacy is the theory that a woman should not perform any chest exercises, as this would “shrink her breasts”. A woman’s breasts are an area of fat deposit just like anywhere else on her body. The breasts will shrink as body fat levels of the entire body are reduced.
Resistance exercises for the chest would not cause a reduction in size. In fact, it might help your breasts appear larger as you can stimulate growth of your pectoral muscles. The larger pectoral muscles would help push out the fat found on your breasts and assist them in looking bigger.