Are you describing a 'feeling' that is 'internal' and not so much an actual physical difference? I ask because when you write about it, you often talk about how it 'feels' and don't worry so much about what is happening.
Could it be that the 'feeling' is the real difference, and that in both 'athletic' and 'internal' the body is actually responding in the same way?
With the new diagram (new Diagram
)in the second 'strong alignment' drawing. If the force is actually going into the font leg in that way, wouldn't it require more muscle to hold this position?
In the original red line force input, the skeleton is taking force (that's why there needs to be an alignment). This allows the muscles work less. In the new blue line, the muscles must do all the work to keep from being pushed over, and it seems to me that this would require more muscular strength and endurance. Do you agree or disagree?