Science of Running

In this week’s episode Steve and Jon discuss injuries as an unavoidable, unpredictable part of running due to impact and eccentric loads, arguing coaching has shifted from “rest and hope” to creative training that maintains fitness without worsening injury. They outline a framework for evaluating injuries by type (bone, soft tissue, metabolic/overtraining, and “WTF” injuries),…

The episode focuses on constraints in coaching: manipulating training and environment to drive physical and psychological adaptation by identifying and widening an athlete’s primary bottleneck. David Epstein recounts Sheila Taormina learning the Theory of Constraints in college, shifting from aerobic volume to strength/power, making the Olympic team, winning relay gold, and later competing across four…

Steve Magness and John Marcus continue their peaking series by reframing peaking as maintaining fitness while eradicating fatigue so athletes can express existing fitness on race day, rather than expecting a magical performance boost. They emphasize that peaking is as psychological as physiological: coaches must set realistic expectations that racing will still feel hard, shift…

Steve Magness and Jonathan Marcus discuss how coaches should define a training approach without falling into two traps: having no coherent philosophy by mixing everything, or rigidly copying one system with no flexibility. They argue training must account for environment and reality (altitude, heat/humidity, sea level), athlete population, and psychological constraints, not just physiology or…

Coaching Successful, Part 1: Defining Your Philosophy and Boundaries Steve Magness and Jon Marcus begin a “coaching successful” series by arguing that sustainable high-level coaching depends less on perfect training plans and more on clearly defined philosophy, boundaries, and principles. They discuss the messy identity shift from athlete to coach and warn about “boundary creep,”…