Re: What is Ki?
Call me David, please.
I said I don't think "ki" as a concept can be explained as a "runner' high." I know what that feels like intimately. I know I've felt that during practice. And I know that experience isn't what people generally refer to when talking about how words like "ki," "Kokyu," and "jin," relate to the martial arts.
Now, if you know what "ki" is, and you disagree, tell me why.
If you can't tell me why, explain to me in what sense you believe you understand the concept of "ki" better than I.