If you're doing an early morning workout, some experts say it's OK to run on an empty stomach. But if you're doing a longer workout, fuel up with some protein and simple carbs, such as half a banana and a handful of almonds.
To prevent cramps while working out, sip on small amounts of water instead of gulping it down.
Sugary sports drinks aren't necessary unless you've been exercising intensely for over an hour. So for shorter workouts, rehydrate with water or coconut water.
Chocolate milk makes an excellent recovery drink because it not only follows this ratio, but also offers calcium needed to strengthen bones and muscles.