Last year, my brother ran a half marathon in Chicago. The final leg of the race was at Soldier Field–where the Chicago Bears play. My brother played football in high school and has followed the Arizona Cardinals ever since he was a freshman in college in 2001. I know it would be a dream of his to play for an NFL team. Unfortunately, he was not good enough to make a college team. So, hitting the section with Solider Field was a dream come true for him.

After the run was over, I asked my brother what he did to prepare for it. Funny thing was, he didn’t really. He told me that he started to do a little running to prepare. He told me that he would run five or ten miles every other day. I couldn’t believe that he was running such a long distance without really preparing. However, he was able to do it. He finished the race, and didn’t really hurt himself.

The question I asked my brother after that was, what about the “runner’s wall?” He told me that it was hard, but fighting through it was possible. What causes the runner’s wall? A limited level of glycogen.

Trainers and coaches council runners to conserve glycogen as they run. By doing so, people will get more energy out of the fat that they burn. Furthermore, they have the opportunity to get more oxygen as they breathe. If they can do so, the runner’s wall will be less dramatic. Therefore, why not get out and run?