The rear support phase is associated with which of the following in maximum velocity sprinting?

The rear support phase is associated with which of the following in maximum velocity sprinting?

• A. Triple extension
• B. Shoulder flexion
• C. Neck rotation
• D. Ankle inversion

Answer: (A)

In maximum velocity sprinting, the rear support phase relies on triple extension of the hip, knee, and ankle to push off and propel the body forward. As the trailing leg plants behind the body, these joints extend rapidly: the hip drives backward force, the knee straightens to unlock powerful push, and the ankle plantarflexes to propel the foot off the ground. This combination maximizes forward propulsion and enables a quicker leg recovery for the next stride. Other options don’t describe the propulsion mechanism in this phase. Shoulder flexion pertains to arm swing, which complements running but isn’t what generates rear-side force. Neck rotation isn’t a functional driver of sprint propulsion. Ankle inversion isn’t the action used to push off; plantarflexion with proper alignment is what powers the propulsion.

In maximum velocity sprinting, the rear support phase relies on triple extension of the hip, knee, and ankle to push off and propel the body forward. As the trailing leg plants behind the body, these joints extend rapidly: the hip drives backward force, the knee straightens to unlock powerful push, and the ankle plantarflexes to propel the foot off the ground. This combination maximizes forward propulsion and enables a quicker leg recovery for the next stride.

Other options don’t describe the propulsion mechanism in this phase. Shoulder flexion pertains to arm swing, which complements running but isn’t what generates rear-side force. Neck rotation isn’t a functional driver of sprint propulsion. Ankle inversion isn’t the action used to push off; plantarflexion with proper alignment is what powers the propulsion.