What does true longevity in the sport of ultrarunning actually look like? In this episode, we are joined by the incredible Mario Zuniga (known on Instagram as @zoonigamario). Mario proves that age is just a number when it comes to tackling some of the most iconic, grueling endurance events in the country.

What makes Mario's resume mind-boggling is that he accomplished his greatest running milestones all after turning 50 years old. We dive into how he has successfully completed America’s oldest ultramarathon—the legendary JFK 50—an astonishing 10 times, earned 9 Boston Marathon finishes, conquered the rugged terrain of West Virginia's Highland Sky 40 Mile 5 times, and survived the infamous ratcheting pain of The Barkley Fall Classic 3 times. Mario shares his secrets for injury prevention, maintaining high-level consistency across decades, and keeping the passion alive when the trails get steep.

Support the Podcast: If Mario inspired you to keep chasing big goals at any age, please leave us a 5-star rating and review on Spotify or Apple Podcasts!

He told us his strategy, he built the blueprint, and then he executed it to perfection. Samir Baca Ponce (@bacaponcee) returns to the podcast fresh off an incredible VICTORY at the Backyard Ultra Comayagua in Honduras!

When Samir was last on the show, he walked us through his meticulous training block, heat adaptation plans, and nutrition strategy for Comayagua. Today, he’s back to break down what it was actually like when the bell rang and execution met reality. Samir takes us lap-by-lap through the mental and physical highs and lows of the race, how his fueling plan held up over days of relentless running, and the exact moment he realized he was going to be the last runner standing. If you loved his pre-race episode, this victory deep-dive is the ultimate lesson in turning preparation into performance.

• Follow Samir on Instagram: @bacaponcee

• Listen to Samir’s First Episode: Episode 39 - Samir Baca Ponce

• Support the Podcast: If Samir’s victory inspired your training today, please leave us a 5-star rating and review on Apple Podcasts or Spotify!

Why do so many ultrarunners suffer from stomach shutdown or severe muscle cramping despite taking in fluids? In this episode, we sit down with Michael Raynor, co-founder of Raynor Strength and Nutrition, to dive deep into the science of sweat, hydration, and endurance fueling.

Michael breaks down the difference between salty vs. heavy sweaters, what a proper sweat analysis looks like, and why measuring both fluid loss and sodium concentration is a total game-changer for race-day strategy. We tackle the physiological mechanics of gut distress, and debunk long-held myths about muscle cramps. Plus, Michael shares actionable blueprints on pre-hydration, hyper-hydration, and emergency mid-race troubleshooting when your stomach starts sloshing at mile 60.

• Book a Sweat Analysis: Raynor Strength and Nutrition

• Follow on Instagram: @raynorstrengthandnutrition
• Learn More about Precision Hydration Sweat Testing

• Support the Podcast: Enjoyed this deep-dive into endurance science? Leave us a 5-star rating and review on Spotify or Apple Podcasts!