During Maximum Velocity early support, brief concentric knee flexion followed by eccentric hip extension primarily serves which function?

During Maximum Velocity early support, brief concentric knee flexion followed by eccentric hip extension primarily serves which function?

• A. Resists tendency of hip/ankle extension to hyperextend knee; absorbs landing shock.
• B. Helps absorb shock and control forward rotation of tibia over ankle.
• C. Decelerates backward thigh rotation; rotates trunk in preparation for forward takeoff.
• D. Propels center of gravity forward.

Answer: (A)

In maximum velocity running, the body must quickly manage ground impact while staying stable enough to continue sprinting at high speed. The sequence of a brief knee bend followed by eccentric hip extension mainly acts to dampen the collision with the ground and protect the knee from overextension. The short knee flexion helps set up the leg for contact, and then as the hip extends under load, the hip extensors lengthen (eccentrically) to control that extension. This combination resists the tendency for the hip and ankle to push the knee into hyperextension and dissipates the landing forces so the runner can maintain stability and prepare for the next cycle. Other options describe effects that are less central to this moment, such as rotating the trunk or producing forward propulsion, which aren’t the primary role of this sequence in early support.

In maximum velocity running, the body must quickly manage ground impact while staying stable enough to continue sprinting at high speed. The sequence of a brief knee bend followed by eccentric hip extension mainly acts to dampen the collision with the ground and protect the knee from overextension. The short knee flexion helps set up the leg for contact, and then as the hip extends under load, the hip extensors lengthen (eccentrically) to control that extension. This combination resists the tendency for the hip and ankle to push the knee into hyperextension and dissipates the landing forces so the runner can maintain stability and prepare for the next cycle. Other options describe effects that are less central to this moment, such as rotating the trunk or producing forward propulsion, which aren’t the primary role of this sequence in early support.