Every day, Hart goes to someplace Stevenson calls "his mental gym. Whether it's five minutes or 45 minutes, he goes there. It could be five minutes of breathing. It could be 10 minutes of mental imagery" — in which he recalls past successes. "It could be 10 minutes of concentration grids. It could be ball drills. It could be juggling. It could be meditation. What I've done over the years is give him a whole bunch of [mental] exercises, and he has a smorgasbord to choose from. He doesn't consider the mental part of the game as an adjunct. It is part of his training. So just as much as he goes to the gym to work on his core, he'll spend time every day working on the mental part of the game."