So your definition of "internals" is basically wedging your body under the force like a door stop? That's what your diagram #1 is doing. I don't think it's even good athletics.
That diagram #1 shows bones and the muscles of lets say the arm. By aligning the bones, the muscles don't have to contract as much/work as hard. It is basically what is happening when I show my push demon in my structure and alignment video.