Yeah I agree - I also thought they would have mention karate as one of the tenets is Zen Breathing. I know that there was a Catholic meditation group in my diocese. I don't know what happened to it as I hadn't heard about it for a while.
One possible additional group of options which I would like to have seen mentioned (and what research has shown concerning their effects on heart health) would be ones such as religious practices - such as prayer (which might be considered in a similar group as TM), and religious attendance/worship activities. Maybe a follow-up that addresses what studies have shown on the relation of those (of varying religious backgrounds) types of activities/followings/practices.