As walking speed increases, how does the shoulder sagittal plane motion change?

As walking speed increases, how does the shoulder sagittal plane motion change?

• A. It disappears
• B. It reverses direction
• C. Its amplitude increases
• D. It becomes fixed at neutral

Answer: (C)

As walking speed goes up, the arm swing must cover a larger arc to help balance the body and maintain efficient momentum. The shoulder moves through more flexion and extension during faster gait, so the amplitude of its sagittal-plane motion increases. It doesn’t disappear, reverse on its own, or stay fixed at neutral—the swing simply becomes larger as speed rises.

As walking speed goes up, the arm swing must cover a larger arc to help balance the body and maintain efficient momentum. The shoulder moves through more flexion and extension during faster gait, so the amplitude of its sagittal-plane motion increases. It doesn’t disappear, reverse on its own, or stay fixed at neutral—the swing simply becomes larger as speed rises.