In this rerun episode, we dig into the science behind what’s happening inside our bodies with registered sports dietitian Ashley Reaver. Ashley highlights five key biomarkers that endurance athletes should pay attention to—explaining why they matter, what healthy ranges look like, and what steps we can take if our numbers are off. From performance to recovery, these biomarkers influence how well we train and how resilient we are to stress and fatigue. Ashley also shares practical strategies athletes can use to optimize their nutrition and overall health. With her background as a private practice dietitian, UC Berkeley instructor, and lead nutritional scientist at InsideTracker, Ashley brings both scientific depth and real-world application. Whether you’re chasing new PRs or aiming for long-term health, this conversation offers valuable insights every runner can put into practice. Check out her private practice

Episode Sponsors:

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• Get the NEW "1 > 0" running hat HERE. Limited supply

In this episode, we sit down with Ben Rosario, Head Coach and Executive Director of Hoka Northern Arizona Elite Team, aka Hoka NAZ Elite, to uncover how professional runners train—and how everyday runners can apply the same strategies. Ben shares why success isn’t only about big workouts, but also about the fundamentals: getting enough sleep, fueling properly, and building strength without needing a fancy gym. He emphasizes the importance of stretching and mobility, as well as truly respecting easy days to allow the body to recover and adapt. Listeners will also learn how pros approach pacing and why managing effort can make the difference between struggle and breakthrough. No matter your age, background, or ability level, these simple yet powerful habits can help you run stronger, faster, and further. This episode shows that elite training principles aren’t reserved for pros—they’re tools that anyone can use to reach their goals.

Learn more in the book he co-authored with Matt Fitzgerald, In their new book, Run Like a Pro (Even If You’re Slow): Elite Tools and Tips for Runners at Every Level, they help us understand that we can reach our potential if we include some of these training techniques and strategies.

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What does it take to keep running strong from your teens into your 90s? Welcome to The Aging Athlete, a new Trail Runner Nation mini-series co-hosted by ultrarunning icon Krissy Moehl. Every 5 to 6 weeks, we’ll dive into what it looks like to grow older in this sport we love—exploring how to train smarter, fuel better, recover more intentionally, and stay motivated through the decades.

In this fourth episode of The Aging Athlete series, we sit down with Selene Yeager, a leading voice in reshaping how we think about performance, aging, and the female athlete. In this episode, she shares her personal journey from elite triathlete and gravel cyclist to trail runner, navigating midlife hormonal shifts. As the host of Hit Play Not Pause and coauthor of ROAR and Next Level, Selene opens up about redefining success, adjusting training and nutrition, and managing the mental side of aging. She offers practical, empowering insights drawn from science, storytelling, and her own lived experience. We also talk about the changes she’s noticed in her own training and mindset while preparing for an ultra. Whether you’re in your 30s, 40s, 50s or beyond, Selene’s message is clear: your best athletic years might still be ahead.

• Check out her new book, "Next Level: Your Guide to Kicking Ass, Feeling Great, and Crushing Goals Through Menopause and Beyond"
• Her Live Feisty Website

Episode Sponsors

• Janji, Use code TRAILRUNNER for 10% off
• Scarpa, Find your perfect shoe for the trails that lie ahead
• Amazfit - T-Rex 3: Get 15% off
• JAMBAR: 20% off with code TRN20
• Oikos Triple Zero
• Get the NEW "1 > 0" running hat HERE. Limited supply