321. Stop Winging Your Fuel: The Science of Gut Training & Sweat Tech

How do you approach your marathon fueling strategy? If you’re like a lot of distance runners, your routine might look something like this: log your long training miles on nothing but water and sheer willpower, and then just pray your race-day gels work.

In this episode, Leticia and Ryan sit down with Tasha, an expert from Precision Fuel & Hydration, to break down why a "one-size-fits-all" fueling plan doesn't work, why under-fueling your training blocks holds you back, and how to properly train your gut to handle race-day demands. Whether you're targeting a fall major or gearing up for the Valencia Marathon in December, this episode will completely change the way you look at endurance nutrition.

• The Precision Origin Story: How a near-fatal case of hyponatremia (low blood sodium) led founder Andy Blow to pioneer personalized hydration.

• Sweat Rate vs. Sweat Concentration: Why your unique sodium loss is genetically determined and stays stable, while your fluid loss changes with the weather—and the massive "heat myth" runners fall into.

• Gut Training 101: The step-by-step method to teach your stomach to comfortably absorb 60 to 90 grams of carbohydrates per hour without GI distress.

• The Power of Decoupling: Why separating your energy intake (carbs) from your electrolyte intake (sodium) is the ultimate secret to a flawless stomach.

• Race Day Logistics: The science behind morning-of sodium preloading to boost blood plasma volume, and how to successfully manage hydration if you don't want to carry a bottle.

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