Both drills are prone posterior-chain exercises.
They balance flexion-heavy ab blocks, pattern glute–ham synergy, and train scapular organization with a quiet pelvis.
Why Variability is Your Body's Secret Weapon
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 Secrets of Posture Movement and Breath.