Nutrition for Ultrarunners: The Science, Myths, and Strategies That Actually Work with Claire Shorenstein
Everyday Ultra
How to test sweat and personalize sodium
Claire recommends simple pre/post weigh sweat tests and tailoring sodium to sweat rate and fluid intake.
If you’ve ever struggled with GI issues, hydration confusion, high-carb hype, or figuring out what to eat as an ultrarunner… this episode is going to change everything.
In this conversation, I sit down with Board-Certified Sports Dietitian, endurance athlete, and host of the Eat for Endurance podcast — Claire Shorenstein — to break down the nutrition strategies that actually matter for long-distance runners.
We dive deep into the real science behind fueling, hydration, gut training, electrolytes, and everyday nutrition habits — and Claire shares incredibly practical insights that every ultrarunner needs to hear.
Inside the episode, you’ll learn:
• Why GI issues happen — and the specific steps to prevent them
• How to use sodium the right way (and why many runners overdo it)
• Whether high-carb fueling is right for you — and how to know
• The hydration mistakes causing stomach blow-ups late in races
• What everyday nutrition should look like for busy runners
• How to fuel when appetite is suppressed or your schedule is chaotic
• The truth about supplements — and who actually needs them
• Why foundational nutrition matters more than “sexy” strategies
• How to personalize your fueling using real science, not trends
This episode is PACKED with actionable advice, myth-busting clarity, and ultra-specific insight you can use immediately in your training and racing.
Whether you're brand new to ultras or deep into 100-milers, this conversation will help you fuel smarter, feel stronger, and perform at your best.
SHOW LINKS:
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Try PlayOn Pain Relief Spray at playonrelief.com
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Claire's Fuel for Life Crew Membership: https://www.eatforendurance.com/fuel-for-life-crew
Claire's Podcast: https://www.eatforendurance.com/podcast
Claire's 1:1 Services: https://www.eatforendurance.com/virtual-nutrition-coaching-for-athletes
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