"You belong to a church that teaches the importance of education,” President Hinckley taught when he explained his admonition to Be Smart. “You have a mandate from the Lord to educate your minds and your hearts and your hands.” The development and health of our minds will help us be more proficient in our chosen fields of service, and recent science suggests that exercise is crucial in maintaining a healthy mind. In a nutshell, it’s smart to exercise, and in return, exercise can make you smarter.