You are what you eat?
Almost. You use what you eat. If you don’t eat right you won’t use it right. There’s a science to choosing foods for before a workout. The wrong ones can get stored as fat and slow you down.
You got to put gas in your tank before you drive off, but make sure you’re pre-workout meal or snack is fully digested. A huge meal can weigh you down and decrease your energy. Leave about an hour for the dust to settle and make sure to drink plenty of water with it too. The pre-game snack should be 4 things: low fiber, low fat, low protein and a moderate carbohydrate. Think: whole grains, low fat yogurt, banana, veggie juice.
If you’re working out first thing in the morning, be aware of your activity level before deciding to skip breakfast. Moderate exercise might be fine on an empty stomach, but if you’re hitting a high intensity for more than 30mins a slice of whole grain toast could be the difference between making it and faking it.
For more tips on what to eat before you exercise: http://www.sparkpeople.com/resource/nutrition_articles.asp?id=1074&page=3