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Lead Stories: Sunday, September 7, 2008

Scaling the infamous “Wall”
Part I: Marathon preparation

Posted January 30th, 2007 at 2:00 PM by Paul Petersen

Section: Running & Training, Training Tips

I vividly remember my first marathon. I can still visualize the preparation, the excitement and anticipation, the effortlessness of the first half of the race … and the pain and agony of the last eight miles!

I hit the “Wall” during my first marathon, and I hit it hard! By the brutal end, my pace slowed by nearly two minutes per mile, and my second half of the race was 16 minutes slower than the first. Parents covered the eyes of their children as I lurched by them, and grown men wept at the sight of me. It was ugly.

I’d like to say that this was an isolated incident, but it happened in my next three ‘thons as well. Finally, I decided enough is enough, that I was either going to learn how to remove the Wall, or stop running marathons altogether. Needless to say, I preferred the first option, and began studying up on how to scale the Wall.

First, what is the “Wall“? Our bodies are primarily fueled by high-octane glycogen (carbohydrates) during a marathon. The other fuel we use is fat, which uses oxygen less efficiently. Our bodies tend to burn off the glycogen first, and once that is depleted, it will switch over to fat. This causes you to slow down, feel fatigued, and hit the “Wall”.
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