The New Science of RUNNING ENDURANCE: Durability, Fatiguability, Repeatability, Resilience

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Brady and Thomas break down the new viewpoint paper on endurance whose co-authors include Michael Joyner: journals.physiology.org/doi/pdf/10.1152/japplphysiol.00343.2025

0:00 Introduction – The 4 Components of Fatigue Resistance
0:39 What Is Durability? (The Joiner Model Revisited)
4:00 Sponsor: ProBio Nutrition
5:12 How to Use These 4 Terms to Find Your Weaknesses
5:57 #1: Durability – Holding Your Physiology Together at Constant Pace
8:32 How to Train for Better Durability
11:30 #2: Fatiguability – Performance Loss Under Variable Intensity
14:38 Sponsor: RYTHM Health (At-Home Blood Testing)
17:11 #3: Repeatability – Can You Hit the Same Splits Every Interval?
18:36 How to Train for Better Repeatability
22:37 #4: Resilience – Performing Under Unexpected Conditions
23:55 Amby Burfoot's 1968 Boston Win: A Case Study in Resilience
26:47 How to Train for Resilience (Steve Magnus's Secret Tactic)
28:31 The Danger of Being Over-Optimized on Race Day
29:52 Thomas & Brady's Own Strengths and Weaknesses
35:45 Resilience: The Last Unmeasurable Variable in Endurance Sport
37:04 Wrap-Up