Actually, I've heard a lot of therapists recommend soldiers suffering from PTSD tske up needlecrafts or some other sort of similar activity. The idea is to calm amped up ruminating on trauma events. Knitting and crochet are the two most likely to be mentioned.

It's one of the reasons there's been a marked increase in men in the hobby in the last decade or so.

They swear by it. There have been several stories about it published in recent years.