Why is gait efficiency reduced when you lose the Zone of Apposition on one or both sides due to hyperactive superficial sagittal based muscle activity?

• A. It is caused by improved rib retraction and trunk rotation
• B. It has no effect on gait
• C. It improves arm swing and pelvic mechanics
• D. There is a disconnect between the thorax and pelvis, and loss of synchronization for transverse plane integration

Answer: (D)