Educating the Athlete

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Lead Knee Extension Isn't Universal: Why Structure and Readiness Matter More Than the Pattern

Lead knee extension has long been viewed as a universal key to pitching velocity, but recent research shows it’s only beneficial when the athlete is physically and neurologically ready for it. While increased lead knee extension does correlate with higher velocity at all levels, professional pitchers use this pattern to reduce elbow stress through superior strength, coordination, and sequencing. High school pitchers, on the other hand, often gain velocity at the cost of increased elbow torque because their lower-body strength, timing, and fatigue resistance aren’t yet developed enough to support the pattern. The takeaway isn’t to eliminate lead knee extension from youth training, but to stop forcing it prematurely. Mechanics are not one-size-fits-all—structure, readiness, and sequencing matter more than copying a pro-level pattern. Build the athlete first, and efficient lead leg mechanics will emerge naturally, safely, and sustainably.

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