How to fix it: Stay away from sugary sports drinks, unless you're running more than 90 minutes and need to replace electrolytes lost through sweat. You should also try to avoid fruit juices (whole fruit is always better), regular soda, and high-calorie specialty coffee beverages. Plain water is fine for staying hydrated during the week. If that's too boring for you, try squeezing a lemon in your water or drink no-calorie flavored seltzer water. Also, try to limit beer and alcohol consumption to 1-2 glasses per week.