Early support with continued concentric hip extension is associated with which outcome?

Early support with continued concentric hip extension is associated with which outcome?

• A. Minimizes braking effect or foot strike
• B. Increases braking at touchdown
• C. Delays ground contact
• D. Reduces propulsion

Answer: (A)

Starting support early while the hip is still extending concentrically means the leg is actively driving backward as it contacts the ground. This keeps the ground reaction force oriented more forward than backward at touchdown, so the horizontal braking component is reduced. In sprinting, maintaining hip extension into early stance preserves forward velocity and reduces deceleration, which is why this pattern minimizes braking impact at foot strike. The other patterns would either increase braking, delay contact, or diminish propulsion, which is not what this movement produces.

Starting support early while the hip is still extending concentrically means the leg is actively driving backward as it contacts the ground. This keeps the ground reaction force oriented more forward than backward at touchdown, so the horizontal braking component is reduced. In sprinting, maintaining hip extension into early stance preserves forward velocity and reduces deceleration, which is why this pattern minimizes braking impact at foot strike. The other patterns would either increase braking, delay contact, or diminish propulsion, which is not what this movement produces.