If a pitcher cannot achieve adequate trunk rotation position and timing (as seen in a BC or T4 pattern), what compensatory movement typically occurs?

• A. The pelvis tilts anteriorly to compensate.
• B. The lead arm stiffens to reduce trunk rotation.
• C. The knee flexes more to absorb energy.
• D. The thorax will extend to compensate, increasing shear load on elbow and shoulder.

Answer: (D)