A new French study suggests some women should throw their bras in the trash.Professor Jean-Denis Rouillon, a sports medicine specialist from Centre Hospitalier Universitaire de Besancon in Besancon, France, published a study on Wednesday that shows that wearing bras may not prevent women's breasts from sagging, and may in fact increase it. "Our first results confirm the hypothesis that the bra is a false need," Rouillon told France Info. "Medically, physiologically, anatomically, the breast does not benefit from being deprived of gravity. Instead, it languishes with a bra." The 15-year study involved 330 volunteers between the ages 18 and 35. Researchers measured their breasts using a slide ruler and a caliper and recorded any changes throughout the study period.