Rather badly fitting sports bra during a long run on Saturday caused rather extensive chaffing along the underside of one boob - I had no idea until I got in the shower after the run - ouch.
It is now sore and I'm slightly concerned about aggravating it again by the "jiggling" when running. I have a half marathon on Sunday which I have trained hard for and I don't want to be scuppered by a boob injury!