In sprint start, the forward leg swing requires a backward countermovement of which body part?

In sprint start, the forward leg swing requires a backward countermovement of which body part?

• A. Knee
• B. Hip
• C. Arm
• D. Shoulder

Answer: (C)

In a sprint start, the body coordinates upper and lower segments to maximize force into the track. As the forward leg swings through, the opposite arm moves backward. This backward countermovement of the arm helps balance the torso and create a coordinated, powerful drive into the ground, improving acceleration. The knee and hip are involved in the leg swing, but they don’t perform the backward counter-movement; the arm’s backward action (involving the shoulder as part of the arm) is the key counterbalance.

In a sprint start, the body coordinates upper and lower segments to maximize force into the track. As the forward leg swings through, the opposite arm moves backward. This backward countermovement of the arm helps balance the torso and create a coordinated, powerful drive into the ground, improving acceleration. The knee and hip are involved in the leg swing, but they don’t perform the backward counter-movement; the arm’s backward action (involving the shoulder as part of the arm) is the key counterbalance.