#124 Paul Booth: Performance Nutrition And Fueling Strategies For UTMB

Join Coach Scott Johnston for a conversation with Paul Booth, who works alongside Scott as a Performance Nutritionist on the teams of 2025 UTMB 1st-place finishers Tom Evans and Ruth Croft. In this discussion, they explore the fueling strategies and testing used for Tom and Ruth, examine how nutrition influenced their UTMB performances, and share tips and strategies for amateur and elite runners alike. See episode guide for topics covered. To submit your own training questions, or if would like to learn more about the Evoke Endurance community, contact us here.Episode Guide00:00:00 Introduction00:00:39 Paul’s experience and educational background00:04:57 Testing for and optimizing fueling strategies00:14:57 Causes of GI upset00:17:11 Effects of dehydration00:19:29 Strategies for training your gut 00:20:99 Fueling for running vs. cycling00:28:38 Fat for fueling and fat adaptation00:38:48 Glycogen depletion stimulus strategies00:45:05 Pre-race gut training00:46:59 Nutrition should support training load00:49:54 Paul’s thoughts on Kilian Jornet’s fueling strategies00:52:02 Work capacity of world-class athletes00:59:40 Respiratory Exchange Rate explained01:01:58 Carbon-13 isotope testing for measuring carbohydrate metabolism01:10:44 The gamble of fueling and training approaches01:16:20 Model for the future of trail running01:18:09 Final thoughts

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