Hips shift with the lateral roll
The hips must stay fixed; lateral movement should come only from the arms.
Overactive muscles
TFLQuadratus lumborum
Corrective work
Foam RollQuadratus lumborum↗StretchQL side-bend stretch↗The hips must stay fixed; lateral movement should come only from the arms.
Extended lateral position is the most demanding; reduce the reach if form breaks.