You have to know your body. It's part of the beauty of the training process, and once you've determined how much your body and mind can take, you can then begin to reach your potential.

Why couldn't Pheidippides have died at 20 miles?

My goal is to break three hours in a marathon

When you first run up First Avenue in New York, if you don't get goose bumps, theres something wrong with you.

Three half-mile repeats on the track at 5-K race pace with a short recovery jog in between shouldn't scare anyone away-and it will improve your speed.

Numbers don't lie. You always seem to remember your workouts as being a little better than they were. It's good to go back and review what you do.

Experience has taught me how important it is to just keep going, focusing on running fast and relaxed. Eventually it passes and the flow returns. It's part of racing.