The carbohydrate consumed with food is stored, if not immediately used for energy, in the form of muscle glycogen in the liver and muscles, or transformed into fat. The human body has a reduced ability to store glycogen, smaller in sedentary than in sports, but in general limited.

It can still increase, within certain limits, the glycogen stores, knowing that once the body has exhausted its ability to store glycogen, carbohydrate ingested will be converted and stored as fat. Common mistake, therefore, the part of many sports, is to take large amounts of carbohydrates before a race, having not only resulted in a no increase in glycogen stores, but of adipose tissue. Usually the glycogen stores totaled approximately 1.5/1.7 grams of glycogen per 100 grams of muscle, which can reach 2.5 grams in trained subjects; with an adequate power can reach the value of 4/5 grams per 100 grams of muscle. We will see how to achieve this result.