The fix: Drink water only. Avoid high-calorie sports drinks unless you've been exercising at a high intensity for more than an hour. Snack on some thing with no more than 100 to 150 calories. Be sure your after-workout munchies contain a mix of protein and carbs―half a high-protein energy bar, for example. The protein-carbohydrate combo will help restore energy reserves and repair the muscles and tissues that were stressed during the workout.