In this episode, Justin interviews Kristen Davis, a registered dietitian and ultra runner, about the importance of day-to-day nutrition for athletes. Kristen shares her journey into ultra running and how she discovered the significance of proper fueling. She emphasizes the need for athletes to eat enough and avoid under-fueling, as it can lead to health issues and hinder performance. Kristen also discusses the importance of prioritizing breakfast and lunch, as well as providing guidance on eating for fasted workouts and adjusting daily caloric intake based on training volume. In this conversation, Kristen discusses various aspects of nutrition for runners, including post-race nutrition, maintaining energy balance, weight loss vs. performance, working with athletes with eating disorders, addressing under-fueling, body composition and weight, and gear recommendations. She also mentions future topics such as supplements and eating during runs, and recommends another ultra running dietitian, Julie, as a guest for the podcast. Kristen can be found on Instagram at Kristen.K.RD. Chapters00:00 Introduction and Background02:56 Kristen's Journey into Ultra Running and Nutrition09:44 The Importance of Day-to-Day Nutrition for Athletes13:08 Prioritizing Breakfast and Lunch25:40 Eating for Fasted Workouts and Daily Caloric Intake30:26 Post-Race Nutrition32:27 Maintaining Energy Balance33:26 Weight Loss vs. Performance34:33 Working with Athletes with Eating Disorders36:02 Addressing Under-Fueling38:10 Body Composition and Weight42:14 Weight Loss and Behavior Change43:32 Gear Recommendations49:02 Future Topics: Supplements and Eating During Runs50:15 Guest Recommendation: Julie, Another Ultra Running Dietitian51:38 Where to Find Kristen