This bra is very good for running/gym, had no issues this morning.  The only downside for me is it fit a little snug around the chest.  I'm a 38B, maybe I should have gotten an XL instead of an L.  I have the same issue with the Vixen bra, which fits a little more snug than this one.  But I do like this bra and will probably order more, but in an XL.