Theory
A short companion to the diagrams. Five layers.
Acknowledgement
The structural framework — pelvis-spine as one unit, internal/external rotation as the under-discussed key, bone-to-bone contact at the joint as the measurable target, and the cascade through six high-coupling regions around the hip — is anchored in the Hip-Rotation-Cascade Theorem by Baha Nurlybaev. The whole-body extension and the visual model are collaborative research with Vladimir Ilinov.
Phase 1: theory only. Intervention design — the targeted re-introduction of just enough variation to bring the body back into a range it knows how to inhabit — is the next phase of this work.