Dr. Ken Fish was kind enough to take some time out during his SF stopover to demonstrate some of the body mechanics behind topics frequently addressed on this forum.
With just the use of a park bench, he demonstrated on me the difference that a relaxed kua and the proper body structure can affect the ability to absorb/root an incoming force. He was also able to use the same frame and relaxed kua to generate a substantial strike/push without overt use of force. I’m still trying to understand a couple of other things he demonstrated: striking with qi vs. without qi and the difference in compression/expansion used in XYLH and Tongbei strikes; will try to get more clarification the next time I see him. I’m sure there’s more that I haven’t covered, but these were the highlights.