The Wall

You have heard it said many times… “I was running along just fine for the first part of the race, and then I hit ‘the wall.’” For runners, “the Wall” is the point somewhere between the first part of a run in which he or she has plenty of energy and the last leg where they get their “second wind.”

However, what is happening in the body that causes this struggle? If you can understand what causes it, then it is easier to figure out how to alleviate or reduce it.

When you eat carbohydrates, they are broken down into simple sugars. Some of these become glycogen and are stored in the muscles as fuel, which is burned during exercise. For the first few minutes of exercise, muscles use this glycogen, as it is their most convenient source of energy. Glycogen combines with oxygen and produces energy and waste products like lactic acid, which causes muscle soreness after exercise.

After several minutes of exercise, the body will begin to use fat as a fuel source. It takes this amount of time for the body to begin releasing stored fat into free fatty acids in the blood in a large enough amount to satisfy the energy demands of the muscles. After this period, fat becomes the primary source of energy over glycogen.

Fat is burned during aerobic exercise. As we saw in our early posting, aerobic exercise creates the “presence of oxygen” and fat is burned most efficiently in this presence. As long as one is running or exercising within their range of training, they are burning fat with oxygen. When the body is forces beyond its capacity, the exercise becomes anaerobic and the body cannot get enough oxygen.

With glycogen already burned up and a lack of oxygen present, large amounts of lactic acid and other waste products become present in the muscles and they get tight and somewhat pained. This feeling is known as “the Wall.”

However, this is not the end. The body can be trained to deal with the Wall. Speed running and long runs can gradually push back the point at which you shift from aerobic to anaerobic. With further running experience, you can become accustomed to the feeling and deal with it much better. The best way to conserve glycogen and delay becoming anaerobic is to put walk breaks into your runs if you are a beginner. Slow down the pace and use this as a warm up. As you become more advanced, you will be able to lessen the warm up time, delay becoming anaerobic and deal better with the difficult sensation.

BOOTCAMP 619 challenges it members and provides the spirit of teamwork necessary for each person to get past “the Wall” and continue on with their workout. Come in and join us sometime. A little encouragement goes a long way in hurdling the Wall!