A while back I read in the Bodybuilding Bible, that if you are able to read while doing cardio - You're doing it wrong!.
Now since then, I've always kinda smiled to myself at the gym, when seeing someone reading while doing cardio, thinking - "I'm probably doing much better than they are, losing more fat".
But today I saw a video of Kris Gething, where he actually promotes reading as a way to pass time.
So, what is it: Is reading good or bad for your cardio training?