Working out is never an excuse for dressing carelessly By Kelly Hockenberry, Columnist, UnionvilleTimes.com I have been a group fitness instructor for TWENTY years. Yes, I started at the tender age of 10 in case you are good at doing math in your head. Over the years, the style of exercise-wear has certainly changed. I remember, like it was yesterday, donning my THONG leotard (pre-childbearing years,...