Which measure is primarily associated with quiet stance static balance?

• A. COP path length during quiet stance
• B. Dynamic Gait Index
• C. Timed Up and Go
• D. Berg Balance Scale

Answer: (A)

Quiet stance static balance is about keeping the body upright with minimal sway while standing still, so the most direct measure is how the center of pressure moves during quiet standing. The COP path length sums every shift of pressure under the feet over a recording period, capturing both how much and how fast you sway. A shorter path length means steadier stance and better static balance, while a longer path length indicates more sway and reduced static balance. Force plate data makes this measure straightforward and specific to standing still.

The other tests look at different things: dynamic gait and tasks that involve movement or mobility, rather than staying still. So they don’t isolate quiet standing as effectively as COP path length during quiet stance.