" One small but scientifically sound study from Japan found that jogging thirty minutes just two or three times a week for twelve weeks improved executive function. But it's important to mix in some form of activity that demands coordination beyond putting one foot in front of the other.... Aerobic exercise and complex activity have different beneficial effects on the brain. The good news is they're complementary. "

― John J. Ratey , Spark: The Revolutionary New Science of Exercise and the Brain