"Learn to crochet..... my neurologist suggested this as an activity. He said, your hands will only go as fast as your brain can tolerate.
As a matter of fact, it is a skill they teach to NFL football players post concussion."

Good to see a neuro has recommended this. I have been recommending this for the exact same reason for years. NFL players have been doing it for years as a way to relax from the high stress of a game.