Quadriceps become active in very late swing primarily for what purpose? (rephrase)

Quadriceps become active in very late swing primarily for what purpose? (rephrase)

• A. Preparation for heel contact
• B. Toe clearance
• C. Supination of the rearfoot
• D. Hip flexion initiation

Answer: (A)

In very late swing, the primary job of the quadriceps is to bring the knee into near full extension and stabilize it for heel contact. As the leg decelerates its forward motion, the quadriceps contract to straighten the knee so the foot can strike the ground with solid alignment, allowing a stable base for weight bearing right at initial contact. Toe clearance during swing is mainly about keeping the foot away from the ground, which relies more on hip and ankle actions to advance and lift the leg, not primarily on the quadriceps. Supination of the rearfoot is a foot-ankle motion, and hip flexion initiation is driven by hip flexors to move the thigh forward earlier in swing. So the best fit is preparation for heel contact.

In very late swing, the primary job of the quadriceps is to bring the knee into near full extension and stabilize it for heel contact. As the leg decelerates its forward motion, the quadriceps contract to straighten the knee so the foot can strike the ground with solid alignment, allowing a stable base for weight bearing right at initial contact.

Toe clearance during swing is mainly about keeping the foot away from the ground, which relies more on hip and ankle actions to advance and lift the leg, not primarily on the quadriceps. Supination of the rearfoot is a foot-ankle motion, and hip flexion initiation is driven by hip flexors to move the thigh forward earlier in swing. So the best fit is preparation for heel contact.