Nutrition is important in achieving top results for every athlete. Genetic legacy, quality training and adequate nutrition are the most important factors of this success. For quality nutrition, it is essential to know how the digestive system functions, the available food and its properties, as well as the consumption of your body and its needs. The better the consistency of food intake and consumption, the better the metabolism. Proper sport nutrition protects athletes from injuries and it is a great chance for an athlete to adapt their body to stimulation trainings. Nutrition is individual depending on the sex, age, sport, habits, and climate of the athlete. Energy potentials of athletes depend on carbohydrates while sufficient protein intake is required for muscle building and regeneration. Freshness of the body is provided by vitamins and minerals, and for successful sporting activists it is important to hydrate the body. Liquid taking of so-called sport drinks before, during and after is especially needed in the hot summer months. Electrolyte beverages (salts) should be consumed when dealing with extreme sweating. Athletic development can be improved with the proper nutrition that enables a high quality sporting performance, prevents injuries and allows him to maintain his / her health at a desirable level during and after his / her career.