Water and fuel demands increase as your running distance increases.  Have about one-half cup of fluids every twenty minutes and a snack of simple carbohydrates (such as sports gels, packets of honey, and energy drinks), every 45 minutes. Avoid fiber, protein and fat because these take longer to digest and can cause stomach cramps. For recovery nutrition, don't forget that real food can be just as good as, if not better than, sports bars and powders.