Excessive lean-back
Erectors assist; becomes a rowing pattern instead of a pulldown.
Overactive muscles
Erector spinaeHip flexors
Corrective work
Foam RollErector spinae↗StretchHalf-kneeling hip flexor stretch↗Erectors assist; becomes a rowing pattern instead of a pulldown.
Arms curl the bar down rather than the lats driving the elbows.