Mike Tyson’s rise from troubled youth to boxing icon was shaped by Cus D’Amato’s rigorous, psychological training system. Before breakfast, teen Tyson ran 3–5 miles at 4 a.m., performed 2,000 sit-ups and 500 push-ups, and then tackled heavy bag rounds and sparring at fight intensity. His regimen fused physical brutality and mental warfare, using visualization, weaponized anger, and ceaseless repetition to build fearsome power, speed, and conditioning. Recovery and nutrition were equally...