Myth #1: Breastfeeding causes breasts to sag.
Fact #1: The Cooper’s ligament—which maintains the structural integrity of the breasts—only stretches during pregnancy, not breastfeeding.
Myth #2: Walking and running can cause the breasts to sag, and certain exercises can prevent sagging.
Fact #2: Walking and running don’t cause breast sagging. Not wearing a sports bra while walking and running may strain the skin on your breasts, though. Chest exercises don’t benefit the tissue and ligaments in the breasts.
Myth #3: Not wearing a bra causes breast sagging.
Fact #3: While not wearing a bra may strain the skin on your breasts, it won’t cause the skin to sag.