The quest for optimal running performance often leads us down paths of trendy supplements and one-size-fits-all nutrition plans. But what if the real secret lies in personalization? Dietitian and ultra-marathon coach Rachel Laymon cuts through the noise with evidence-based, practical advice on fueling strategies that actually work. Ever wondered how many carbs you should consume during an ultra? Rachel suggests starting with 90 grams per hour—but emphasizes this number should be tailored to ...