In Maximum Velocity Late flight, concentric hip extension is described as which of the following?

In Maximum Velocity Late flight, concentric hip extension is described as which of the following?

• A. Rotates thigh backward in preparation for foot contact
• B. Rotates thigh forward
• C. No rotation
• D. Rotates tibia inward

Answer: (A)

The key idea here is that during the late flight phase in maximum velocity sprinting, the hip extensors (like the glutes and hamstrings) contract concentrically to extend the hip. This action moves the thigh backward relative to the pelvis, so the leg trails behind in preparation for foot contact. In other words, the thigh rotates backward as the hip extends, aligning the leg for an efficient strike and next push-off. Rotating the thigh forward would be hip flexion, not extension, so that option isn’t correct. There is rotation involved, so saying no rotation would be inaccurate. Rotating the tibia inward describes knee-level rotation rather than hip action, so that doesn’t describe the hip extension phase either.

The key idea here is that during the late flight phase in maximum velocity sprinting, the hip extensors (like the glutes and hamstrings) contract concentrically to extend the hip. This action moves the thigh backward relative to the pelvis, so the leg trails behind in preparation for foot contact. In other words, the thigh rotates backward as the hip extends, aligning the leg for an efficient strike and next push-off.

Rotating the thigh forward would be hip flexion, not extension, so that option isn’t correct. There is rotation involved, so saying no rotation would be inaccurate. Rotating the tibia inward describes knee-level rotation rather than hip action, so that doesn’t describe the hip extension phase either.