“POP QUIZ! WHAT’S GOING TO MAKE YOU SMARTER and less prone to brain diseases? Is it A. solving a complex brainteaser, or B. taking a walk? If you guessed A, I won’t come down hard on you, but I will encourage you to go for a walk first (as fast as you can) and then sit down to work on a brainy puzzle. The answer, it turns out, is B. The simple act of moving your body will do more for your brain than any riddle, math equation, mystery book, or even thinking itself. Exercise has numerous pro-health effects on the body—especially on the brain. It’s a powerful player in the world of epigenetics.”