Amy Robach is working up to another epic fitness challenge and by the looks of her latest photos it's going well. The Good Morning America host is gearing up to the Berlin Marathon and posted some post-workout photos on Instagram on Thursday following one of her training sessions. MORE: Amy Robach's happy photo with T.J Holmes gets fans talking Amy wore a sports bra and shorts and showed off her impressive abs and runner's physique in a photo in which she was sitting on a bench surrounded by