No self-experiments but he has posted this https://www.reddit.com/r/slatestarcodex/comments/537w8h/physical_activity_fitness_glucose_homeostasis_and/ https://ww

No self-experiments but he has posted this https://www.reddit.com/r/slatestarcodex/comments/537w8h/physical_activity_fitness_glucose_homeostasis_and/ https://www.reddit.com/r/slatestarcodex/comments/537w8h/phys..., a twin study showing decreased body fat and increased grey matter in response to exercise.