If you’ve been in the running scene long enough, chances are you’ve heard about loading up on carbohydrates the night before a race. Why do they suggest doing this? The main reason is to make sure your body has a lot of simple sugars floating around that can easily be burned for energy. Carbohydrates are much more readily used than fats or proteins so it makes sense to have plenty of carbs before a race, right? Well, it depends on two factors; how long the race you’ll be running is and what your eating habits have been in the weeks …