Bruno, Thank you for the information! By the way, since "Power Sleeping" is currently available only in French, would there happen to be any summary of the concept in English anywhere? I'm fascinated by your studies on Yogis. My original motivation to go raw was to improve my Yoga!. (Anyway, I wouldn't give up Hatha Yoga in a hurry, since the stress reduction aspect just scratches the surface of Yoga). Thanks much! Roy