I think in running, to be honest, that even though athletes are very dedicated and are willing to train and do whatever they need to do to prepare, more often than not they're not in a very professional environment where you've got a high performance director and a coach that are really monitoring your daily activities.

Winning times in the New York City Marathon have not dropped all that much over the years, but rather U.S. runners went backward. In 1983, there were 267 U.S. men who broke 2:20 in a marathon, and by 2000 that number was down to 27.

I've run a lot of miles over the years, some fast and some not so fast. I've won some big races and I've had some big disappointments, but I enjoy the freedom of running and the challenge of training and competition as much now as when I first started back in high school.

I didn't give myself enough breaks during the training year to recover. I didn't understand the power of periodization.

Trust me, my runners aren't going to run one event while looking past it to the second event. When they get on the line for the 10K, that's a do-or-die situation for them.

I like the marathon because it's one race where you can find out who's really the toughest. On the track, sometimes a guy can just pull away, and you want to stay with him but you don't have the leg speed. The marathon is slow enough that anyone can stay with you if he wants, if he has the will. The marathon is ultimately a test of will.

I can't tell you why a particular athlete would leave a certain coach, but I can tell you there could be many reasons. They could have personality conflicts. They could have misunderstandings. Lots of stuff can happen.