I read this book in a couple hours after I received it in the mail. I've competed at the most basic amatuer level in triathlons, and I've led a life that is relatively healthy (I run often, know how to swim, and I take a long bike if the weather permits). Knowing how to eat right, and how to stretch, this book provide absolutely no help to me. If, though, you've never done anything althetic before, and you don't know that "whole foods are better for you than processed foods," and you need to be told not to eat mayonaise three times a day, then maybe you should consider reading this before competing in a triathlon. I was very disappointed.