Hips sag — lumbar hyperextension
Core fails to maintain the plank; lower back bears the load.
Overactive muscles
Hip flexorsErector spinae
Corrective work
Foam RollHip flexors↗StretchHalf-kneeling hip flexor stretch↗Core fails to maintain the plank; lower back bears the load.
Anterior shoulder is stressed; pec loses the optimal line of pull.
Neck extensors strain; cervical spine is loaded.