Disclosure: This post is part of my partnership with NYRR, as one of their social media ambassadors for the TCS New York City Marathon I will be posting weekly on preselected topics. I have trained for four marathons and am actually training for my fifth as we speak. I only made it to one and in a few weeks I will be running my second. Two of the five I dropped out due to running injuries and one of them I dropped out due to a shoulder injury. I would say the bulk of ...