Elbows drop below shoulder height
Rear delt and rotator cuff are taken out of the exercise.
Overactive muscles
Latissimus dorsiTeres major
Corrective work
Foam RollLats↗StretchLat stretch (kneeling overhead)↗Rear delt and rotator cuff are taken out of the exercise.
Erectors and hip extensors generate the pull; posterior shoulder underloads.