As a triathlete, it seems we all have an addiction for reading up on the sport, whether it be on the Internets or in those papery substances that historians talk about on the Internets (I think they used to call them “books”). If there was only one book that you were allowed to read as a Triathlete, I think it would have to be the Triathlon Training Bible, by Joe Friel. One thing he covers is how to determine what your training zones are, which are useful for knowing how hard to go during a workout. Since training for Cyclocross begins in earnest next week (woohoo!), I figured it would be a good idea to get an accurate idea of what my training zones are in order to get the most out of my workouts.