Nutrition plays a main role in boosting an athlete's performance.Pre workout nutrition is equally important as the post workout.Increased energy from pre workout meal will help you to prevent the tiredness during the workout. Exercising in full stomach is not recommended,food particles remaining in the stomach during workout or event can cause stomach discomfort,stomach upset,stomach cramps,nausea and vomiting.You should allow the meal to digest it completely before the workout or event.Pre-workout meals should be consumed one to two hours before your workout,if it is in snack form,otherwise 3-4 hrs prior to workout if it is a proper meal.In an endurance athlete, eating sugar or glucose 35 to 40 minutes prior to an event may provide energy.