Sometimes you have to suffer to learn the lesson. It hurts. You may bleed. You will cry. But! You know what? In some strange way these things happen for our benefit. The 24 hour world championships hurt more than I have ever hurt before! Now I know about magnesium and it is a mistake I doubt I will ever make again. In hind sight of maybe another 15 really competitive years it's nice to learn the lesson so early.