In maximum velocity sprinting, which phase is associated with rotation of the thigh backward in preparation for foot contact?

In maximum velocity sprinting, which phase is associated with rotation of the thigh backward in preparation for foot contact?

• A. Late flight
• B. Early flight
• C. Mid flight
• D. Early support

Answer: (A)

Late flight is the phase when the thigh rotates backward as the leg swings forward to contact the ground. This backward rotation positions the foot under the center of mass and aligns the knee and ankle for a quick, powerful ground contact, which is crucial for maximizing velocity. By preparing the foot strike in this way, the sprinter minimizes braking and sets up a strong push-off for the upcoming ground reaction force. Early flight involves the leg still moving forward toward contact, mid flight is the middle portion of the swing, and early support occurs after the foot has already contacted the ground, so none of those phases best describe the backward thigh rotation leading into foot contact.

Late flight is the phase when the thigh rotates backward as the leg swings forward to contact the ground. This backward rotation positions the foot under the center of mass and aligns the knee and ankle for a quick, powerful ground contact, which is crucial for maximizing velocity. By preparing the foot strike in this way, the sprinter minimizes braking and sets up a strong push-off for the upcoming ground reaction force. Early flight involves the leg still moving forward toward contact, mid flight is the middle portion of the swing, and early support occurs after the foot has already contacted the ground, so none of those phases best describe the backward thigh rotation leading into foot contact.