Re: Int. Vs. Ext - resisting a push
Standard disclaimer applies - i.e. my understanding is still a work in progress and bla-bla, reading my crap is more likely to send you astray then help you, etc. etc..
I think it is important to note that the ground here and ground-reaction-force does not have to be special. That is, grounding force meets up here with the "balloon man" idea. If you are lightly expanded in all directions, then force can hit the surface of the balloon, ride the surface, and come out somewhere else. In the direct case, it can touch one side, and come out the other side. This is as opposed to creating a frame with specific lines through which stuff goes down, like the skeleton.
There is not relaxation, per se, so much as a light tonus that is induced by making the mind work to expand the body everywhere to support that balloon, the whole internal bit.
I think something I was trying to emphasize in the other thread when responding to Chris Hein, was that a simple push is almost never a simple push. The push may just look like someone pushing you from the front, but even as it boils down to physics, this applies all sorts of weirds torques and directions to the body. So just trying to set up a single pathway from the push to the ground rarely ever works out so well, and this is one of the reasons the whole balloon man thing seems to better account for all the variables - if only because your brain can't think through the micro-level physics of it - so rather than try to, just handle everything...