Brace yourselves as we embark on an exhilarating journey to the frontiers of human endurance with our esteemed guest, Dr. Nicholas Berger. Dr. Berger's insights provide us with a cutting-edge understanding of the unique factors that drive ultra-endurance athletes to push beyond their limits. His co-authored paper serves as our roadmap, guiding us through the intricate facets of ultramarathon performance. Have you ever wondered why some people have an insatiable desire to conquer the impossible? Well, we tackle this head-on, exploring evolutionary traits that make us uniquely suited for ultra-endurance running. We also discuss the W.E.I.R.D (Western, Educated, Industrialized, Rich Democracies) phenomenon, providing a thought-provoking perspective on who is most likely to engage in this extreme sport. From the importance of strategic pacing and nutrition to psychological and thermoregulatory management, we bring you practical implications that are vital for athletes and coaches alike. But our tour de force doesn't end there. We delve into the often-overlooked individual factors contributing to GI distress during ultra-endurance events, sharing proven strategies to alleviate these discomforts. Highlighting the significance of adjustable nutrition plans, we discuss the role of physiological resilience in such grueling events. With a nod to the impact of technological advancements like carbon fiber shoes and the inherent challenges of studying ultra-endurance running performance, we leave no stone unturned. Strap in for a thrilling, knowledge-packed adventure into the world of ultra-endurance running. So, are you ready to explore the limits of human endurance? TU Research Profile Google Scholar Profile ResearchGate Twitter Limits of Ultra: Towards an Interdisciplinary Understanding of Ultra-Endurance Running Performance SUBSCRIBE to Research Essentials for Ultrarunning Buy Training Essentials for Ultrarunning on Amazon or Audible. Information on coaching-https://www.trainright.com Koop’s Social Media Twitter/Instagram- @jasonkoop