Exactly. Your body is very good at storing energy (fat). It's also pretty good at burning fat while running, especially at the slower pace that is typical of lo

Exactly. Your body is very good at storing energy (fat). It's also pretty good at burning fat while running, especially at the slower pace that is typical of long distance running. You can eat a couple of thousand kcal in one sitting, but you can store a hell of a lot more around your waist. Getting enough water and electrolytes during a long distance run is much more important than having breakfast beforehand.