Double-Threshold Training: The High-Intensity Pace Elite Runners Use to Boost Endurance
Across the world’s top endurance groups, a training approach called double-threshold training is gaining traction as a way to push performance beyond traditional limits. The core idea is simple in concept but demanding in practice: schedule two workouts each day that sit between the athlete’s first and second lactate thresholds, the point at which fatigue and lactate accumulation begin to accelerate. These sessions, spaced several hours apart, are designed to train the body to tolerate the “dull ache” of prolonged effort and to improve sustained power when racing at threshold intensity. In plain terms, athletes push through a higher ceiling without fully crossing into maximal effort, training the body to clear lactate more efficiently while extending the time before fatigue bites.