It turns out feminists who burned their bras decades ago may have had the right idea.

A 15-year study published in France suggests that instead of offering protective support bras actually cause sagging.

For years lingerie makers  have promised that bras prevent a downward drift and even back pain.

But French scientist Jean-Denis Rouillon  says that denying gravity  prevents the body from developing natural musculature to keep the tissue in place.