Today marked the start of my 18-week marathon training program. It began, rather anticlimactically, without any running at all. Rather, Monday will be my cross-training days, and so I headed to the university aquatic center for some lap swimming. Besides my practice swim last Monday, I haven’t done any serious swimming since I was taking lessons over a decade ago. However, I felt pretty good. I did 20 laps total, 5 freestyle, 5 breaststroke, 5 backstroke, and 5 more freestyle. Let’s hope my arms don’t feel like jelly all this week like they did last…