Rolling the shoulders forward on the shrug
Anterior rotation adds pec minor and anterior delt load; upper trap loses the focus.
Overactive muscles
Pec minorAnterior deltoid
Corrective work
Foam RollPectorals↗StretchDoorway pec stretch↗Anterior rotation adds pec minor and anterior delt load; upper trap loses the focus.
Bar swings forward; erectors take the load rather than scapulae depressing fully.