Interesting article:http://www.sciencedaily.com/releases/20 ... 130054.htm
Somebody posted it on the sister site, Dhammawheel.
Not surprising. In my experience, sitting isn't necessary. Pain is overcome through not having a preference of having comfort and avoiding discomfort. For instance, it's winter. On a cold winter day, some people shiver, whine, and think about how cold it is. A Zen meditator thinks, "This body is cold, but this body is notself," therefore there is no discomfort. Not just in cold weather, though. But when they enter a warm area, like entering a warm environment after leaving a cold one, like a hot shower on a cold day, they don't think, "Ahhh! Relief!" because it is only the body that gets cold and warm, not the self; one's Buddha nature is not expressed due to temperature changes.