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
After using a low carbohydrate for 14 years over my ultramarathon racing career, I decided for my next 100 mile training cycle and race, to try high carb. I outline why and how the first 8-weeks have gone.
Substack Post: Testing High Carb after 14 years Low Carb
Low Carb Series: My Low Carb Approach
Endurance Training Simplified Series
LMNT: drinkLMNT.com/HPO (free sample pack with purchase)
Royi Metser joined me to share some discuss how we collect data through wearables like watches, foot pods, and heart rate monitors. We dive into the future of how footwear can add to these data points, in an effort to better optimize mechanical loading.
Royi: @royimetser & @avelorunning - Kickstarter
Endurance Training Simplified Series
LMNT: drinkLMNT.com/HPO (free sample pack with purchase)
Dr. Matthew Cook is a Senior Lecturer in Sport and Exercise Science at the University of Worcester. Dr. Cook has worked with a range of athletes including cyclists and runners. He joined the podcast to discuss the topic of fat oxidation as it pertains to endurance training and racing.
Nick Bare is the founder of Bare Performance Nutrition (BPN), and has built a large brand around sharing his journey chasing fitness goals. Recently, Nick and BPN launched a Last Man Standing event called, G1M Ultramarathon on his ranch in Texas. It went viral despite little pre event mainstream ultra media coverage, but rather exploded from participants and BPN creating live and pre/post event content around it. We chat about Nick...
Brady joined me to chat about some shoes we have been trying out the last couple of months. Shoes we covered include; Speedland RX:FPY, Tracksmith Eliot Racer, Puma Fast-R Nitro Elite III, New Balance 1080v14 & Rebel v4, ON Cloudsurfer II, Brooks Hyperion Max III & Launch 11. Shoe card specs for the models we discussed are available on Instagram at @hpopodcast
Endurance Training Simplified Series
LMNT: dri...
Phil Gore recently broke the Backyard Ultra World Record at Dead Cow Gully, completing 119 yards (6.7 km loop), which totaled 495.86 miles (798.014 kilometers). Phil plans to compete at Big's Backyard, which hosts the Backyard Ultra World Championship. Phil and I dive into all that goes into the preparation and competition within Backyard Ultras, and why bigger numbers are coming.
Phil: @phil.gore.ultrarunner | Strava
WSER 100 is becoming one of the most recognized and high stakes 100 mile ultramarathons for both professionals and ultramarathon participants. we can learn a lot about how participants are preparing and completing this event. Here are some things to consider from what we learned at the 2025 WSER 100.
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Heat adaptation and in race management
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The power of race day expectations
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The psychology around g...
Jeff Garmire is a professional ultramarathon athlete, coach, author, podcast host, and one of a very few to have participated in all Cocodona 250 events. Long ultras are not even long for Jeff, as he has also completed some monster through hikes like John Muir Trail, Arizona Trail, Continental Divide and more. He is currently gearing up for an unsupported attempt on the Appalachian Trail in August.
Meghan Canfield has a deep history and love for the WSER 100 Endurance Run, completing it 13 times and finishing in the top 10 on 10 occasions. She has been a long time friend, and big influence on the ultramarathon community. She joined me to discuss why the WSER 100 is unique, her many experiences with this event, as well as growing with the sport.
This episode covers some current topics in the ultramarathon world. Topics covered include; big name injuries a result of high volume training and shoes, has ultramarathon growth and access resulted in cheating, Gerda Steyn the Queen of Comrades.
Edit: Gerda Steyn has won Comrades 4x: '19, '23, '24, '25
Endurance Training Simplified Series
Zach’s Low Carb Endurance Approach Series
LMNT: drinkL...
James Pieratt of Wild Hunt Conditioning joined me to catch up before he kicks off his 1,100 mile journey along the West Coast and discuss the famous Rarámuri Tribe's endurance practices and lifestyle.
Dan Green recently won the Cocodona 250 and broke the course record along the way with a time of 58:47:18. Prior, Dan has found success running fast times at the Javelina 100, including breaking 13 hours last year and landing on the podium.
Dan Green: IG @danisgreen - YouTube: @BargainBoysMedia
Megan Eckert is a World Record holding ultramarathon athlete for Mount to Coast, teacher, and coach. She recently broke the women's 6-Day World Record, by completing 603 miles. She holds the women's Backyard Ultra record with 87 laps for 362 miles, qualified for Team USA's 24-Hour World Championship Team, and much more.
Alyssa Clark has covered a wide range of events in the ultramarathon world. She has wins at Moab 240, HURT 100 Mile, San Diego 100 Mile, Ouray 100 Mile, and Canyons 100 Mile to name a few. Alyssa also battles ulcerative colitis, presenting an additional hurdle when fueling daily and during races that entail a large nutrition variable.
Charlie competed in D1 Cross Country and Track & Field for the University of Minnesota. He currently holds the World Record for the 50 Mile, 4:48:21 (5:46/mi). He recently won the USATF 50 KM Road Championships in a time of 2:49:01.
Endurance Training Simplified Series
Zach’s Low Carb Endurance Approach Series
LMNT: drinkLMNT.com/HPO (free sample pack with purchase)
deltaG: deltag...
Sam Harvey is one of the best Backyard Ultra runners in the World. He was part of the legendary push that resulted in three men breaking the World Record at the Big’s Backyard Ultra Championships in 2023. He has a wide range, which he recently showcased by winning the Tarawera 100 mile this year.
Endurance Training Simplified Series
Zach’s Low Carb Endurance Approach Series
LMNT: ...
James Pieratt of Wild Hunt Conditioning is preparing for a 1000 mile point to point journey along the West Coast, hitting some historic sites along the way. We unpack some of the specifics in preparation and event execution.
Endurance Training Simplified Series
Zach’s Low Carb Endurance Approach Series
LMNT: drinkLMNT.com/HPO (free sample pack with purcha...
Adventurer, speaker, author and USMC Vet. Just completed a 60 day solo, unsupported journey covering 500 miles across Antarctica.
Endurance Training Simplified Series
Zach’s Low Carb Endurance Approach Series
LMNT: drinkLMNT.com/HPO (free ...
For this episode, I share some thoughts on the topic of "fit but unhealthy." Recently, pro triathlete Lionel Sanders shared some details about his health concerns. This came as a surprise to some as he is visually very healthy and performed at a very high level. Some have hypothesized it is due to his hyper carb fueling strategy. Others have suggested endurance training to the degree taken by professional ...
Trishul and Bob are the President and Record Keeper for the Global Organization of Multi-day Ultrarunners (GOMU). GOMU was established to supplement the existing government bodies that only recognize records of certain ultramarathon events. Both Trishul and Bob have rich histories in ultramarathon, with 100s of official events to their names. We dive into their experiences as well as the growing needs when it comes to rules and rec...
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