458: Anthony Cockrill on Squat Dynamics in Explosive Strength Development

Anthony Cockrill, Director of Volleyball Sports Performance at Southern Methodist University, details a training system focused on maximizing vertical jump and athletic performance through eccentric-biased loading and movement variety. By prioritizing deep ranges of motion—specifically through Zurcher squats with heel elevation and fat bars—the program builds a robust "bandwidth" to handle chaotic sporting demands. Cockrill emphasizes the importance of eccentric contractions and overcoming isometrics to drive structural adaptations, while minimizing reliance on traditional concentric-focused sets and reps. The methodology integrates "gymnastic" movement patterns to enhance kinesthetic awareness and utilizes true plyometrics like depth jumps year-round to refine the stretch-shortening cycle. This approach shifts away from standard periodization to focus on specific, quantifiable adaptations that prepare athletes for the high-intensity, short-term demands of collegiate volleyball.