>Running 101>Evolution Running
...Maybe chi means evolution in some ancient now dead language and it was dug up for use with Tai chi and chi running to denote energy.
"Able to function despite imminent catastrophe"
"To obtain the air that angels breathe you must come to Tahoe"--Mark Twain
"The most common question from potential entrants is 'I do not know if I can do this' to which I usually answer, 'that's the whole point'.--Paul Charteris, Tarawera Ultramarathon RD.
√ Tahoe Rim Trail 100M 19/20 July 2014
Georgia Death Race 14 March 2015
Boston Marathon 20 April 2015
So, does that scream snake-oil, or am I just being too pessimistic?