Jump to: What Is Physiological Resilience? How Researchers Measure Physiological Resilience How to Improve Physiological Resilience for Better Race Performance In a few weeks, Jonah Rosner , exercise scientist, certified strength and conditioning coach, and seven-time marathoner, will head from Austin, Texas, to England for a battery of lab-based tests. With Michele Zanini , PhD, a lecturer in applied sport and exercise science at Open University in England, he’ll have his VO₂ max tested, then run three hours at his marathon pace, and test his VO₂ max again. The point? To see how physiologically resilient or “durable” he is—and whether or not he can improve on this key marker of endurance performance. Researchers are calling this resilience, or the ability to withstand fatigue, the “fourth dimension” of running performance predictors .…