Trunk leans toward the weight
QL and lateral trunk fail to resist the load; becomes a lateral squat.
Overactive muscles
Quadratus lumborumTFL
Corrective work
Foam RollQuadratus lumborum↗StretchQL side-bend stretch↗QL and lateral trunk fail to resist the load; becomes a lateral squat.
The asymmetric load shifts the center of mass and collapses the valgus.