You know you won’t perform your best on an empty tank. But eat too much, too close to game time, and your pre-game meal may wind up on your shoes (or in a nearby trash can). Your best bet is to eat a pre-game snack about half an hour before you step onto the court or field to top off your energy stores, helping you power past opponents in the closing minutes.
A good pre-game snack will give you easily digested carbohydrates (simple sugars, not complex carbs or fiber), and perhaps a little protein and fat. Ideally, your snack will be portable and capable of staying good for hours inside a backpack or locker, since not every student-athlete has access to a refrigerator.