Let us begin with how the body is fueled. The human body uses carbohydrate as the primary source of energy for sustained, strenuous physical activity. In fact, some fifty-percent of the energy your body uses comes from carbohydrates, specifically glucose, and its storage form, glycogen (Rady Rolfes, Pinna, and Whitney, 2006). That is the energy you are using while you exercise, while your body will burn more fat for energy when you are at rest.
It is of utmost importance to make sure enough carbohydrate is included in your diet if you want to be a competitive athlete. Proper "carbohydrate loading" before exercise will decrease the perception of fatigue during extended exertion (Colgan 1993). That doesn't mean, however, that you only need carbohydrates before training, but rather, if you want to train at maximum efficiency, you need high quality carbohydrates throughout the day, every day. It is recommended that the athlete make sure to consume around 650 grams of carbohydrate per day(Colgan 1993). The