Amy Robach is a huge fan of working out and posts almost-daily pictures of herself on various running routes around New York city.MORE: Inside Amy Robach's beautiful home away from the cityAs a result, the mother-of-two has an incredible physique – much to the envy of her fans.What's more, the Good Morning America star shared the secret to her fitness success in her latest post on Instagram. VIDEO: GMA's Amy Robach stuns fans with cooking video inside stylish homeOver the weekend, the journalist