Excessive lean-back
Torso reclines past 30° — becomes a row; lats disengage.
Overactive muscles
Erector spinaeHip flexors
Corrective work
Foam RollErector spinae↗StretchHalf-kneeling hip flexor stretch↗Torso reclines past 30° — becomes a row; lats disengage.
Scapulae elevate at full extension instead of staying depressed.
Cervical spine forced into flexion under load — high injury risk.