". Regular group yoga classes are not recommended for patients with psychotic symptoms, but private yoga sessions with a qualified yoga instructor or yoga therapist can help alleviate symptoms and improve a schizophrenic patient's quality of life." from the pro-yoga article, seems to me to indicate the same sort of concern that the meditation article indicated. It certainly seems credible that high-intensity and novel experience, combined with poorly understood philosophy promoting something that sounds vaguely loss-of-affect style psychotic symptoms, might encourage the development of those symptoms in people inclined to develop them and even in some people not so inclined.