OK, maybe make it a little simpler... let's take a really basic exercise like funekogi undo where you're expanding/contracting in one plane only... same idea? How about doing funekogi without moving at all? I.E. simply stand as you would as if in preparation to do funekogi, BUT without the forward/backward rowing motion? What would you be training then? How would you be training? What is it you're working on?
Then, if you want to talk about "testing", have someone hold your wrists and push gently, straight in with a constant force, whilst in that position. Can you bounce/push/throw them off - without moving? How much arm/shoulder are you engaging? Where is your power coming from? And how is that the same/different to basic kokyu-ho where you simply throw the uke up and back, or to the side?
Interesting. I've bounced ppl off if they come to grab me in that position using intent. But I can't do it if we start from static. In the first scenario, I 'intent' an atemi into his center. It is possible that attached to this intent I do move maybe 2-3mm to the front. Perhaps that is why I find it impossible to this from static without moving at all.
Can you tell me how you do this from static?
Also can you tell me if you can draw uke in without moving your hands inwards? I've been trying to achieve this too.
Both instances happen to be 2 of the 7 characters of aiki i'm trying to train. But its pretty hard with my teacher living in another country.