The Importance of Zone Three

Two to three sessions at the top level is all you can handle of those real intense stuff. Dr. Siler did this fascinating study of four by four minute intervals, four by eight minute intervals and four by 16 minute intervals. You can't do them as hard as you can do a form and interval. That's a pretty damn good workout. Neil Henderson: There is a real value for your top end race fitness to train just a little below threshold. And I still that when we did the hour record training, we were trying to target that exact point right around 95%.