Chi running is a running form technique that advocates a greater forward lean of the torso and a midfoot as opposed to the more common heel strike. A lot of claims are made for the benefits of Chi running.

More on Chi Running:

http://www.podiatry-arena.com/podiatry-forum/tags/index.php?tag=/chi-running/

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=79295