28 Apr '14, 7pm

The Long Run: How much should you eat on a run? It depends on a few factors, writes Scott Jurek.

The Long Run: How much should you eat on a run? It depends on a few factors, writes Scott Jurek.

While debate exists over how carbohydrates affect the body, the scientific theory I tend to side with these days is the central governor theory, or what happens to the central nervous system when we eat carbohydrates. When we run for longer than two hours at race pace, our bodies must use both stored fat and carbohydrates, or glycogen, for fuel. Unfortunately, glycogen reserves last for only 60 to 90 minutes; after that, the body turns to stored fat. To fend off fatigue, the nervous system needs glucose to keep stimulating and firing the muscles, otherwise performance suffers; on the extreme end, we bonk and see stars. Our bodies can be trained to burn fat while running at fast paces, but at some point, carbohydrates are needed to give the nervous system a jolt.

Full article: http://running.competitor.com/2014/04/inside-the-magazine...

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