Ladies, ladies, ladies...please watch this video if your current sports bra doesn't fit or your boobs still bounce.
Breasts are mostly composed of fatty tissue and are supported mainly by skin and fragile ligaments called Coopers' ligaments. Because these are not elastic, during repetitive or high impact sport the breasts bounce and pull on the ligaments, forcing them to stretch. Once these ligaments have stretched they stay this way.
The result is every woman's nightmare - sagging breasts.
Going without the correct support can also cause breast pain and upper back and shoulder problems.
This video looks at how to measure yourself to correctly fit a sports bra and how to tell if your bra is too small or too large.