18th December 2025

Asker Jeukendrup is a sport scientist whose work has been massively influential, especially in the world of endurance nutrition. His resume is incredible, working with many of the top athletes, teams, brands, and research institutions during his remarkable career. In addition to his academic, consulting, and speaking work, Asker is a co-founder of Neversecond -- a leading supplier of feuling and recovery products in endurance sport and an important partner of Freetrail. This is Asker's first appearance on the podcast. Timestamps: 00:00 What Makes You You? 05:13 Founding NeverSecond: A Science-First Approach 08:22 The Carbohydrate Revolution in Endurance Sports 10:54 Understanding Carbohydrate Absorption and Ratios 13:29 Nutrition Strategies for Varied Trail Running Distances 18:14 Gut Training: Assessing and Improving Carb Tolerance 23:34 Fasted Runs and Fat Metabolism 31:49 The Role of Carbohydrates in Performance 36:28 Understanding Nutrition for Racing Performance 41:00 Cooling and Its Impact on Nutrition Absorption 44:40 The Sodium and Electrolyte Debate 47:34 Caffeine: Benefits and Cautions 48:00 The Future of Health Monitoring in Athletes 55:32 Personal Stories and Lessons from Elite Athletes 56:00 Looking Ahead: The Future of Nutrition in Sports Asker's consultancy - https://www.mysportscience.com/ REGISTER FOR THE BIG ALTA - https://ultrasignup.com/register.aspx?did=130943 REGISTER FOR GORGE WATERFALLS - https://ultrasignup.com/register.aspx?did=129366 Sponsors: Grab a trail running pack from Osprey - https://www.osprey.com/catalogsearch/result/?q=trail runnng Use code FREETRAIL25 for 25% off your first order of NEVERSECOND nutrition at https://www.never2.com Go to https://www.ketone.com/freetrail30 for 30% off a subscription of Ketone IQ Freetrail Links: Website | https://freetrail.com/ Freetrail Pro | https://freetrail.com/freetrail-pro/ Patreon | https://www.patreon.com/dylanbowman Instagram | https://www.instagram.com/runfreetrail/ YouTube | https://www.youtube.com/channel/UC8MKI1xB8YMchI1764zJXHg Freetrail Experts | https://freetrail.com/freetrail-experts/ Dylan Links: Instagram | https://www.instagram.com/dylanbo/ Twitter | https://twitter.com/dylanbo LinkedIn | https://www.linkedin.com/in/dylan-bowman-06174380/ Strava | https://www.strava.com/pros/1596921