David Roche (coach, writer, sub-ultra runner AND ultrarunner, winner of the 2024 Leadville 100 ultra) joins us to chat about how his nutrition plan unfolded for the Leadville 100. Not only did he smash the previous course record time for the Leadville race, but he also showed that high performing ultrarunners can push the limits of high carb fueling and benefit from ergogenic aids like sodium bicarbonate.  Our discussion includes: David’s athletic background Changes in his nutrition from young athlete days to current times including a snapshot of a typical day of nutrition and supplements Physiological testing prior to Leadville 100 David’s gut training and nuances with hydration intake goals Use of exogenous ketones, sodium bicarbonate, caffeine Preparation for the Javelina Jundred 100 Links: SWAP Running – coaching from David and Megan Roche David and Megan Roche’s Some Work, All Play podcast Precision Fuel & Hydration  Science in Sport More about our guest: David is the 2014 USATF Trail Runner of the Year at the sub-ultra distance and winner of the 2024 Leadville 100 in course record time. He is a two-time national champion and three-time member of Team USA. He graduated with honors from Columbia University with a degree in Environmental Science and received a master's degree and law degree with honors from Duke. --- Check out our new Patreon membership options over at patreon.com/isnpodcast – sign up and take advantage of some special benefits, savings, and opportunities for bonus content with Bob and Dina. We’d love to connect with you on social! Follow Dina on Instagram at @nutritionmechanic and Bob at @enrgperformance. You can learn more about Bob’s services at www.enrgperformance.com and Dina’s services at www.nutritionmechanic.com.