How might poor sagittal plane movement cause pathology in proximal girdles and ball and socket joints?

• A. It improves central axial mechanics and reduces pathology.
• B. It has no impact on proximal girdles.
• C. It causes hypermobility in distal joints only.
• D. It creates hypermobility in proximal girdles and ball-and-socket joints, leading to pathology, as flexion and rotation must occur somewhere.

Answer: (D)