Researchers say this is the secret to having firmer bre@sts..

Women wear bras to help support their brea sts and keep them from sagging and losing their youthful pertness. But a new study has revealed that bras cause exactly the opposite.
Sports science researcher Jean-Denis Rouillon worked with 330 women aged between 18 and 35 for 15 years to come to the conclusion that women should ditch their bras and go free.
 The subjects, who had varying bre ast sizes, were monitored for a decade and a half..During his study, Rouillon found that woman who went braless developed more muscle tissue and tone, meaning their bodies gave them natural support where it was needed.
Rouillon told France Info :

• “Medically, physiologically, anatomically brea sts gain no benefit from being denied gravity. On the contrary, they get saggier with a bra.”
Dr Stafford Broumand, a plastic surgeon at Mount Sinai Medical Centre added to Refinery29 :

“On the surface, this claim seems plausible.
“For younger women, not wearing a bra will lead to increased collagen production and elasticity, which improves lift in a developing bre ast.”