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.
It's easy to cover up any inadequacies by moving, not so easy to do so from static.... so be prepared to not be able to do this, and not for a very long time, until you gain some conditioning. Having a good uke who understands what they are meant to do, and knowing how they can help you find it is a big plus.
If you look at it the other way, from big movement to small, a static position is simply the opposite of small to big. Does that help?
Intent is obviously involved, but it's not really the intent to atemi. It's more or less about using uke's own force against himself + a little of your own. After all, it IS a purely defensive martial art isn't it??? Newton's 1st, 2nd and 3rd laws ring any bells?
A pull is a push in the opposite direction. Where are the vector forces going in a "pull", in which you're not moving your hands? Where does the power come if you don't actually move your hands inwards?