When it comes to priming your muscles for a workout, carbs are your best friend. They provide glucose, the fuel your muscles run on. But, like different grades of gasoline, not all carbohydrates are created equally. Slowly-digested, complex carbs from whole grains deliver a sustained blood sugar release that energizes you throughout your workout. And oatmeal is a winning choice. It’s rich in beta-glucan, a fiber that slows digestion and keeps blood sugar on an even keel. For maximum results, choose whole oats. They’re digested more slowly than quick cooking or instant oatmeal.