Nutrition is one of the three factors that mark the practice of sports, the others are the particular genetic factors of the athlete and the type of training performed. The foods that are included in a sports diet serve three basic objectives: they provide energy, provide material for the strengthening and repair of tissues, maintain and regulate the metabolism. There is no general diet for athletes, each sport has special demands and specific nutrition.

Chronic diseases are long-term conditions, largely contagious, avoidable. They are the first cause of death in the world, especially diseases such as obesity, diabetes, cardiovascular diseases, cancer, dental diseases and osteoporosis. Physical exercise and proper nutrition can help reduce the risk of suffering from these diseases.