CHARLIE MARTIN: 13 Weeks: Week 12 — In Which We Get Cross and Fit. “It’s week 12 of 13, and time to start thinking about the next thirteen weeks. I’ve taken to calling it my ‘second season’, indulging my fantasy of writing for TV. As I’ve been saying for a while, I’m going to emphasize the fitness part of the training for the next thirteen weeks. This is in addition to the dietary changes that turned out to be the focus of the first 13 weeks, so let’s summarize the whole: overall motivation and what I’ve been doing.”