I spent several years fighting with heavy weapons and armor in the SCA, and a lot of the same mechanics for generating power were involved. Waist turns, moving with a unified body, etc. When you're carrying a heavy sword and shield and wearing 50 lbs of extra weight, you have no choice but to use good mechanics and let physics do the work. It's why I still train with weapons.
The idea of letting gravity and posture do most of the work to generate power is not unique, neither are any of the other concepts usually lumped in loosely with internal.
Used to watch SCA events,,,very cool...I would hope someday CMA also hosts things similar.
It's been tried before with CMA but never seems to catch on...people then start to change the styles to fit
into the current format, something that I've never agreed with....
I would suggest reading some of writings on this site
https://brennantranslation.wordpress.co ... i-fa-shuo/It's perhaps best illustrated by rooting, someone tries to push me, I sink into my root, as they attempt to change the vector of their force to find the weak angles in my root, I use tension, relaxation, posture, and intention to change how I'm routing that force to neutralize its affect on my structure without using any visible movements.
There's nothing else I've experienced which takes that approach to get that result, though there are plenty of arts that get to a similar result through their methods.
I'm okay with qi as mechanical energy and as the bioelectric force that sustains cellular activity, sure. I have trouble with claims of qi in the sense of bio energy being used directly as an offensive weapon. I have not yet experienced anything that cannot be explained through classical physics and the "magic" of training the frame spectrum.
The effects of the combined skillset can be spooky. Just yesterday in push hands I found myself jumping in place and wondering out loud why I did that. My partner did it to me three more times before I accepted it was his doing. Nothing spooky at all about it though. Before I pushed down I raised up and he sensed that and just helped me go up, when I sank instead of my body going down my feet came up because my root was already broken.
that might be one way of looking at it, others as I would might explain it in a different way.. You mentioned "jumping" or "hopping" as some call it.
Sensed what? might be a good starting point.
Why should it be "spooky" push hands is just a type of training. The question for most is training what?
Reading the posting here many have different answers for this. The masters are pretty specific as to what it is and is not.
IME most people seem to ignore this and just focus on "pushing"
Even now many look at taiji as some type of stand up grappling ignoring
the other facets of the art.
"Willie" is one of the few people I've read talking about the other uses...
Nothing magic, no mystical qi, just intelligently applied physics. It can seem spooky and mystical though, and I'm sure some enjoy playing that up to sell superpowers.
I don't know of any other training that can produce that specific sort of result regarding sensitivity and effective responsiveness. Translating that skill to combat, even at a low level, is highly effective
Most acknowledged masters, I know of do try to make what is done more understandable relating it to "physics" although physics holds only part of the answer. Translating the skill is secondary to getting the skill in the first place. This to me is where most get hung up or confused about.
Even to the point on an "IMA" site most things shown requiring either inner skill or at least understanding get mocked and those that do not are held up as examples of "inner skill" when clearly in most cases what is done is not much different from what would be consider normal skill sets.
In my own case it was only after some 30yrs of training in CMA that I ran into anyone that did indeed change my whole view point.
On this site there are some members hosting seminars that are said to have skill sets that only few achieved according to those who've attended them.
Might be something worth checking out