" If you move enough, your muscles change and grow. So does your mind. The brain initiates movement. But it is, in its turn, remade by movement. New cells are born; new vessels sprout. The same process operates body-­wide. No cell in your body is unaffected by motion. Your very DNA is changed. "

― , The First 20 Minutes: Surprising Science Reveals How We Can: Exercise Better, Train Smarter, Live Longer