Sorry to resurrect this well trodden debate/discussion.
The video of a talk by John Vervaeke posted by Robinhood, is very good and very close to the mark with respects to explaining Qi and the bodily mechanisms involved. Yes, it is quite esoteric and some will have to research the terminology and background knowledge that John assumes the listener has already established.
Of course, my praise for Vervaeke is a big IMO but he is supremely worth understanding and I can't help but feel that many posting in this thread just do not want to spend the time, to understand him.
I re-post the link to John's talk below. Many thanks to Robinhood for initially posting it!
http://www.youtube.com/watch?v=vcp6J...eature=related