Athletics News The Mysterious Syndrome Devastating Endurance Athletes: What You Need to Know Revealed: The Shocking Syndrome Wrecking Endurance Athletes – What Every Athlete Must UnderstandBy William GreenMay 8, 2026 A baffling syndrome is rapidly impacting endurance athletes, causing sudden fatigue and performance decline. Experts at RUN | Powered by Outside investigate its origins and potential treatments as cases rise worldwide.