Bouncing Breasts Spark New Bra Challenge

Breasts move far more than ordinary bras are designed to cope with, according to a new study. And they also bounce more during exercise -- up to 21cm rather than the maximum 16cm bounce measured in past studies. Bras are designed to stop breasts bouncing but this study shows that breasts also move side to side and in and out. It is estimated that more than 50 percent of women experience breast pain when exercising.