Performance depends largely on the foods consumed during the days and weeks leading up to an event. If your regular diet is well-balanced and carbohydrate-rich you probably have ample glycogen stores to fuel your athletic activity. The purpose of the pre-competition meal is to prevent hunger and to provide water and additional energy needed for competition. Most athletes eat 2 to 4 hours before their event. Some athletes perform their best if they eat a small amount 30 minutes before competing. Other athletes do not eat for up to 6 hours before their athletic event. For many athletes, carbohydrate-rich foods serve as the basis for their meal.
There is no magic athletic diet. Simply choose foods and beverages that you enjoy and that do not bother your stomach. Experiment during the weeks before an event to see which foods work best for you.