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.
Gretchen Reynolds, The First 20 Minutes: The Surprising Science of How We Can Exercise Better, Train Smarter and Live Longer
brain, change, mind, movement