Knees cave against the band
The band is the stimulus — caving means glute med and max are failing.
Overactive muscles
Adductor complexTFL
Corrective work
Foam RollAdductors↗Foam RollTFL↗StretchButterfly adductor stretch↗The band is the stimulus — caving means glute med and max are failing.
Erectors push the hips up past neutral; glute max is bypassed.