Eat a healthy breakfast

If you exercise in the morning, get up early enough to eat breakfast — that may mean one to two hours before your workout. Most of the energy you got from dinner the previous night is used up by morning, and your blood sugar may be low. If you don't eat, you may feel sluggish or lightheaded when you exercise. If you plan to exercise within an hour after breakfast, eat a lighter breakfast or drink something to raise your blood sugar, such as a sports drink. Emphasize carbohydrates for maximum energy.

Good breakfast options include:

Whole-grain cereals or bread
Low-fat milk
Juice
Bananas

If you're not a fan of eating in the morning before you work out, try a sports drink or have a bigger bedtime snack the night before. And remember, if you normally have coffee in the mornings, a cup or two before your workout is probably OK. Just don't try any foods or drinks for the first time before a workout, or you risk an upset stomach.