Nutrition is one of the many factors that ensures optimal athletic performance.
Like all athletes, swimmers require a nutritionally balanced diet containing nutrients to sustain normal daily activities as well as those associated with training and competition. Swimming places extraordinary demands upon the respiratory, cardiovascular, and energy producing systems of the body. Calories found in food provide the energy while the remaining nutrients, particularly vitamins and minerals are used in various functions to help release the extra energy needed. Thus, a swimmer's nutritional status and dietary habits are important factors for success in both training and competition. Swimmers are not always aware of their nutritional needs and some may consume inadequate diets.