CNN Chief Medical Correspondent Dr. Sanjay Gupta explains how routine exercise can help your brain as well as your body.<script type='text/javascript' src='http://z.cdn.turner.com/cnn/van/resources/scripts/van-widgets.js'></script> <div data-cnnvansinglewidget data-affiliate='gantdaily' data-videoid='health/2016/02/10/your-brain-on-working-out-sanjay-gupta-orig.cnn' data-size='auto' data-autostart='true'></div>