If you run at a 10 minute per mile pace, you can burn 104.3 calories per mile.
Exercising increases the production of cells that are responsible for learning and memory.
When you become dehydrated your brain tissue loses water causing your brain to shrink and pull away from the skull. This triggers the pain receptors surrounding the brain, giving you a headache. Dehydration also causes your blood volume to drop which in turn lowers the flow of blood and oxygen to the brain.