Women who took off their bras (or good experienced a 7mm lift In their nipple* each year they didn't wear a bra. Researchers also found that bra-less women developed firmer breasts and saw their stretch marks fade. Women have long been told that a good bra can help support the chest, relieve back pain and prevent sagging. However, a new is-year French study reveals the opposite: bras do little to reduce back pain and, over time, they can actually make breasts sag even more. Researcher Prof. Jean-Denis Rouilton, a sports science expert from the University of Besancon in eastern France claims that bras are a false necessity, according to The local.