Human Performance Outliers Podcast with Zach Bitter

Human Performance Outliers Podcast with Zach Bitter

Welcome to the Human Performance Outliers Podcast. Your host Zach Bitter, will take you through a series of interesting topics around health, fitness, endurance, running, hybrid athlete training, ultramarathon, and nutrition. Join in for interviews with folks exploring their outer limits and research in a wide variety of sports, fitness, and nutrition.

Episodes

March 13, 2026 74 mins

Jonah Rosner is a sport scientist, performance coach, and the founder of Marathon Science, a platform dedicated to translating cutting-edge endurance research into practical insights for runners and hybrid athletes. Jonah previously worked in the NFL and now focuses on helping endurance athletes train smarter through evidence-based training, nutrition, and performance strategies.

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Raj Pannu recently won and set the course record at the USATF 100 Mile National Championships. Raj was determined for redemption this year after being DQ'd last year due to his shoes not meeting USATF guidelines. In this episode, we discuss his trajectory through the 100 mile distance and steady improvements over the years. 

Raj: @lightningraj 

Endurance Training Simplified Series

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Rachel Entrekin is a 2x Cocodona Champion, and course record holder. She joined me for an in-depth interview discussing her transition to professional running, training methods, multi-day race strategy, and the evolution of ultrarunning.

Rachel: rachelentrekin.substack.com | IG: @rachel__entrekin

Endurance Training Simplifie...

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High carb fueling has been gaining momentum over the past few years. Claire Shorenstein shares some things to consider around this process to make it more sustainable and long lasting. Claire is a sports dietitian who hosts Eat for Endurance. She is a Board-Certified Sports Dietitian (MS RD CSSD) with over a decade of experience helping active people achieve their nutrition, health, and fitness goals. I'm also a longti...

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The sport of ultramarathon is growing! With that, we have much more exposure to the wide range of events that fall within the ultra category. With growth, we see increased competitive pressure, but not always in a uniform manner. Let's discuss what this means for the different disciplines within ultramarathon, and what we will likely see in the coming years.

Endurance Training Simplified Series

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Everett Smulders is an American distance runner, coach, and entrepreneur. He became an NCAA All-American and achieved a personal best of 3:58.93 in the indoor mile (2021), going sub-4:00, along with strong marks like 1:48.31 in the 800m and 3:42.86 in the 1500m. After college, he transitioned into ultra running and endurance events. He is the founder and CEO of WesFly Athletics (or WesFly Training Systems), a running m...

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Peter Bromka is a 2:19 marathoner, acclaimed writer, and passionate voice in the running community. Peter transformed his marathon debut from 3:07 to 2:19, coming agonizingly close to the U.S. Olympic Trials qualifying standard. Peter co-hosts the podcast, Road to the Olympic Trails, where collaborates with Lindsey Hein and Matt Chittim to uncover the stories behind the Olympic Marathon Trial Qualifiers.

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Brad Stulberg researches, writes, and coaches on health, well-being, and sustainable excellence. He is the bestselling author of The Practice of Groundedness and co-author of Peak Performance. Stulberg regularly contributes to the New York Times, and his work has been featured in the Wall Street Journal, Washington Post, Los Angeles Times, The New Yorker, Sports Illustrated, Outside Magazine, Forbes, and other outlets....

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Elite marathoner Rory Linkletter discusses his historic sub-60 half marathon at Houston, training philosophy changes, and preparation for upcoming races. Rory is coming off a big year, where he placed sixth at Boston in 2:07:02, second at Ottawa in 2:08:31 (winner recently provisionally suspended for doping), ninth at Chicago in 2:06:49. 

Rory: World Athletics Profile - IG: @rory_linkletter - X: @ThePapaL...

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Jason Fitzgerald is a life long runner, and host of The Strength Running Podcast. In this episode, we discuss if Truett Hanes can reach the Olympic Trials Marathon Qualifying time of 2:16, the increase in strength athletes embracing running, the role of strength in running, and the rise in popularity of muscular endurance and fatigue resistance training strategies.

Find Jason: strengthrunning.com | IG: @ja...

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I ended the year with a race where I didn't meet expectations. These types of experiences offer opportunities about what should be kept, versus what will likely lead to the same mistakes. For this episode, I highlight how I assess a training cycle to tease out the positives and the learning opportunities. 

Endurance Training Simplified Series

ProBio: probionutrition.com/endurance Code: Enduran...

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In this episode, I reflect on my build into this year's Desert Solstice Track Invitational where I plan to target a fast 100 miler and 12 Hour ultramarathon. Included, my history with this event, how things went leading into it, how I structured my training, and my strategy around nutrition, hydration, pacing, and cooling for the event. 

Endurance Training Simplified Series

ProBio: probionutri...

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In this episode, Jeff Mogavero joins the podcast to discuss his exciting year in trail and ultra running, including his impressive second-place finish at Javelina (2024), notable performances at Canyons and Western States, and a nail-biting win at Ultra Trail Cape Town. Jeff dives into the specifics behind these successes, highlighting the impact of fine tuning his hydration strategy. The conversation also explores Jef...

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December 3, 2025 39 mins

For this episode, I dive into some of the fundamental elements to structuring a running program in a sustainable way. This guide is helpful for beginners and runners looking to best organize their current training.

Endurance Training Simplified Series

ProBio: probionutrition.com/endurance Code: Endurance (20% Off)

LMNT: drinkLMNT.com/HPO (free sample pack with purchase)

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Anne Flower burst onto the ultramarathon scene this year by breaking the long standing Leadville 100 Mile Course Record of 31 years at her debut 100 mile race. She turned things around quickly for a very different experience by breaking the 50 Mile World Record at the Tunnel Hill 100/50 three months later. Anne trains and races while maintaining a career as an ER Doctor. 

Anne: Mountains to Mountains - IG:...

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Caitriona Jennings, an Irish long-distance and ultra-distance runner has had a distinguished career spanning marathons, ultras, and international competition. She represented Ireland at the 2012 London Olympics and has set multiple national and world records, particularly in ultra distances. She recently broke the Women's 100 Mile World Record at Tunnel Hill 100 Mile, where she finished in a time ...

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For this episode, I unpack my race at the Equalizer Endurance Run 12 Hour, where I split 11 hours 48 minutes 25 seconds for 100 miles. I share what went into the thought process leading in, how I navigated the day, and dive into my high carb fueling strategy.

Endurance Training Simplified Series

ProBio: probionutrition.com/endurance Code: Endurance (20% Off)

LMNT: dri...

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Kilian Korth recently won the Triple Crown of 200s, which is a three race series, including Tahoe 200, Big Foot 200, and Moab 240. He not only won the series, but all three of these 200+ mile races outright. We dive into many of the topics around the rise of these multi-day ultras.

Kilian: IG @runtoughmindset | Substack: https://runtoughmindset.substack.com/about

Endurance Training Simplified Series

ProBio...

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Nicholas Thompson is the CEO of the Atlantic and an avid runner. He holds the American 50 KM record (age 45–49): In 2021, Thompson set an American record for his age group in the 50K (31 miles), finishing in 3:04:36.

Nicholas Thompson: nicholasthompson.com | IG: @nxthompson | X: @nxthompson

Endurance Training Simplified Series

ProBio: probionutrition.com/endurance Code: E...

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In this episode of the Human Performance Outliers Podcast, Zach Bitter is joined by performance nutritionist Dr. Marc Bubbs to discuss the intricacies of optimizing energy through nutrition. Dr. Marc Bubbs is a Performance Nutritionist, author, speaker and consultant for a portfolio of professional and Olympic athletes and Fortune 100 companies. He is also the co-founder of ProBio Nutrition. They cover various key topics including ...

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