Dr. Kyle Pfaffenbach, a nutrition expert from Eastern Oregon University, dives into the challenges of gut distress faced by endurance athletes like Kristian Blummenfelt, who recently experienced severe vomiting during a race. He discusses the physiological causes behind gastrointestinal issues and how factors like heat, bike position, and hydration play crucial roles. The conversation also covers nutritional strategies, including the benefits of glutamine and probiotics, highlighting the complexity of individual responses and the importance of tailored nutrition for optimal performance.