Back in the fall I signed up for my 5th marathon, the Maine Coast Marathon, as well as the half marathon, in the same weekend. After months of slacking on training (I only did two back to back long runs, I was supposed to do them every other week), I wasn’t sure I was up for the 39.3 challenge. My goal for the weekend was to run the half marathon on Saturday conservatively to save energy for the next day, have fun, and to feel good. I wanted to finish the half and then evaluate for Sunday. I didn’t tell many people I was running both races because my head…