I'm curious about this too. Many Buddhist monks sit cross-legged (http://en.wikipedia.org/wiki/Sitting#Cross-legged http://en.wikipedia.org/wiki/Sitting#Cross-l

I'm curious about this too. Many Buddhist monks sit cross-legged (http://en.wikipedia.org/wiki/Sitting#Cross-legged http://en.wikipedia.org/wiki/Sitting#Cross-legged) for long periods of the day, and I haven't heard of them having any health problems due to this.