Nutrition and hydration – two of my favorite topics! #saidnooneever But as a registered dietitian (and coach!), I will say, nutrition and hydration actually “excite” me. They are two variables that you have 100% control over. You cannot say this about many things on race day! You can’t control the weather, you can’t control the competition, you can’t even control (to some extent) how your body will feel. But you CAN control what you put in your mouth to fuel you for the race distance of your choice. So, let me share a little of my excitement with you!