Everything this has an influence in the organism in relation the factors of peripheral fatigue in the accomplishment of exercises and, moreover, in the replacement of energy before, during and after-activity. The carboidrato passes all for this process come to have a fall who starts to liberate the glucose is the liver as already said the top. Conclusion Was concluded in this study that due to importance of the carboidrato them athlete to be great power plant and assists in the esportivo performance of the same ones, this macronutrient is essential for our organism, being with that each gram of this alimentary component produces about four calories for source of deglutida effectiveness, that is, the gram of the same determines four calories for ingested power plant of in the athlete. The athlete ingesting the carboidrato it reduces the risk of the fatigue and will have, therefore a better condition of what of another athlete who does not make an feeding with the carboidrato, therefore this will have a muscular depletion with bigger probability of if fadigar more quickly. Then he can finish itself that the carboidratos must be consumed before the physical activity acquiring energy, during and after the physical activity so that is made a replacement of muscular and heptico glycogen.