Hips do not fully lift off the mat
Lateral core and shoulder cannot support the full hip lift; build with a bent-knee regression.
Overactive muscles
Quadratus lumborumTFL
Corrective work
Foam RollQuadratus lumborum↗StretchQL side-bend stretch↗Lateral core and shoulder cannot support the full hip lift; build with a bent-knee regression.
Upper trap elevates; serratus and lower trap should stabilize the arm.