These are core pieces of the Classical Ab Series. They train segmental thoracic flexion and hip dissociation while the trunk stays organized (anti-extension, anti-rotation). Breath shapes the abdomen from the inside—your “free core brace.”
A hip-centric circumduction drill done supine that trains hip dissociation (femur moving in the socket) while the pelvis and rib cage stay quiet. Builds...
The Essential Language of Movement, Anatomy, and Exercise