Braless is Best? Study Says Bras Make Breasts Saggier

Should you ditch your bra? Should you ditch your bra?

Marilyn Monroe slept in a bra to keep her assets firm and perky, according to Hollywood lore. A new study out of France suggests it might have been more effective for the screen goddess to go "au naturel" instead.

Yahoo! OMG: Lady Gaga's Controversial Assault Rifle Bra

Researchers spent 15 years studying the breasts of over 330 women (only in France, folks), and concluded that wearing a bra does not prevent sagging or ease back pain as commonly thought. "Medically, physiologically, anatomically-breasts gain no benefit from being denied gravity, Professor Jean-Denis Rouillon, from the University of Besançon, told France Info Radio. "On the contrary, they get saggier with a bra."

More on Yahoo: The Disgusting Truth About How Often Women Wash Their Bras

Taking measurements with a caliper, the researchers found that by not wearing a bra, muscles around the breast actually strengthened and the "nipple raised 7mm per year toward the shoulder." However, the scientists did not recommend all women abandon their bras since their muscles had probably already degraded.

While the phenomenon of "bra burning" has been greatly exaggerated, in 1970s it was not only politically correct but also fashionable to go braless in the United States. Since then, women have been trussing themselves into increasingly structured-and expensive-undergarments. According to Business Week, the women's intimates' industry is generates over $11 billion a year.

The results of the study may be intriguing, but its doubtful that droves of American women are going to ditch their bras anytime soon. For one thing, a study by the Center for Talent Innovation found that women with jiggle around the work place deemed less worth to become executives by both men and women.

Furthermore, the study focused on women ages 18-35. According to France's English-language news site The Local, one of the study's participants 28-year-old Capucine reported, "There are multiple benefits: I breathe more easily, I carry myself better, and I have no back pain." We'll see what she says at age 50.

Also on Shine:

Is Victoria's Secret Marketing to Teens with their Bright Young Things Line?

Three Bras Every Woman Should Own

Got Breast Milk Jewelry: Baby Memento Trend Goes Beyond Footprints or Lock of Hair