Originally Posted by Robb Wolf
I remember Mark Twight mentioned that shorter intense work provides adequate machinery for longer efforts but not the mental toughness. Only longer efforts can provide this.
I believe this whole-heartedly. Last year I ran my first marathon. My training program consisted of the CrossFit WOD Monday-Thursday, then a long run on Saturday. The long runs increased steadily until I reached 20 miles. It worked very well for me. It kept me injury free (the first time I've been able to run injury free in 15 years) and I finished with a respectable performance. Could I have done better on a traditional marathon training program, maybe.
I do have one disagreement. I'd have to say that the CF stuff at times was much more difficult (for that mental toughness) then the long runs ever were.