When my twin sister, Danielle and I decided to run a half marathon, we knew we wanted to train for it. I really believe that anyone in half-decent shape can run a half marathon. It may take you 7 hours and you may have to walk the entire thing, but you could wake up and do it if you really wanted to. In our minds though, training was part of the process. We started out with one goal: to run the whole thing. We came up with a 16-week training schedule to get us in half-marathon shape just in…