
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.
Latest episodes

Apr 25, 2024 • 24min
Episode 393: Ultra Long Run - How I Train & Eat
This is part four of a four part series where I detail how I train and eat throughout my training cycles for ultramarathon. This episode highlights the ultra marathon long run phase. Endurance Training Simplified Series SFuels: sfuelsgolonger.com code: BITTER5 ***FREE SAMPLE PACK LIMITED OFFER*** Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Zach: zachbitter.com IG: @zachbitter X/Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter

Apr 24, 2024 • 28min
Episode 392: Speed Work Development - How I Train & Eat
This is part three of a four part series where I detail how I train and eat throughout my training cycles for ultramarathon. This episode highlights the speed work development phase. Endurance Training Simplified Series SFuels: sfuelsgolonger.com code: BITTER5 ***FREE SAMPLE PACK LIMITED OFFER*** Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Zach: zachbitter.com IG: @zachbitter X/Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter

Apr 23, 2024 • 26min
Episode 391: Base Building - How I Train & Eat
This is part two of a four part series where I detail how I train and eat throughout my training cycles for ultramarathon. This episode highlights the base building phase. Endurance Training Simplified Series SFuels: sfuelsgolonger.com code: BITTER5 ***FREE SAMPLE PACK LIMITED OFFER*** Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Zach: zachbitter.com IG: @zachbitter X/Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter

Apr 22, 2024 • 38min
Episode 390: Offseason - How I Train & Eat
This is part one of a four part series where I detail how I train and eat throughout my training cycles for ultramarathon. This episode highlights the offseason. Endurance Training Simplified Series SFuels: sfuelsgolonger.com code: BITTER5 ***FREE SAMPLE PACK LIMITED OFFER*** Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Zach: zachbitter.com IG: @zachbitter X/Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter

Apr 12, 2024 • 47min
Episode 389: Training Races Yes or No?
Zach and Nicole share some advice around what to consider when doing training races during your primary race training. SFuels: sfuelsgolonger.com code: BITTER5 Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Nicole: IG: @nkbitter Zach: zachbitter.com IG: @zachbitter X/Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter

Apr 5, 2024 • 2h 4min
Episode 388: Vinny Crispino - Movement Specialist
Vinny Crispino founded Pain Academy after breaking his back while surfing. As a former D1 Swimmer, he didn't want to accept defeat and began a journey to fix his issues. Vinny shares his journey and how he has helped people who don't move like they used to and struggle with chronic pain, nagging injuries, or other movement issues. We also dive into the mental aspect of running an ultramarathon. SFuels: sfuelsgolonger.com code: BITTER5 Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Vinny: painacademy.net IG: @painacademy Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Mar 29, 2024 • 50min
Episode 387: Sabrina Little with Nicole - Philosophy & Running
This episode is part of a series where Nicole will be interviewing a guest. The topic of this series is centered around individuals excelling in sport while maintaining a highly demanding career. Sabrina Little is a Philosophy PhD and assistant professor, mother, and has participated on five national teams ranging from 100km to 24 hours. Sabrina recently published a book titled, "The Examined Run." SFuels: sfuelsgolonger.com code: HPOPRO20 (20% off protein products through March 31st), BITTER5 (5% off any order) Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Find Nicole: IG: @nkbitter Find Sabrina: https://sabrinalittle.com - IG: @sabrinablittle - X/Tw: @sabrinablittle - Book Updates: website - IG: @hoppodcast

Mar 22, 2024 • 2h 5min
Episode 386: Dr. David Heitmann - Couch To 100 Mile Check In
Dr. Dave will be challenging himself to complete the Javelina 100 mile in 2024, going from the couch to the 100 mile distance in a years time. Dave has an extensive background as a medical director, treating thousands of patients, including: Olympians, National Champions, sports teams, and professionals. After losing his own health in the pursuit of helping others find theirs, Dave and his family embarked on a wild journey that included living in a bus, working on organic farms, traveling the country before ultimately landing them in Austin, Texas. SFuels: sfuelsgolonger.com 20% Off Protein code: HPOPRO20 Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones code: BITTER20 HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Dave: mindofdave.com - IG: @mindofdave - YT: @mindofdaveMOD Zach: zachbitter.com IG: @zachbitter X: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Mar 15, 2024 • 1h 43min
Episode 385: Rory Linkletter - 2:08 Marathon & 2024 Olympics
Rory Linkletter is a Canadian Marathon Athlete sponsored by Puma. He recently clocked a 2:08:01 marathon, which falls 9 seconds under the standard required to participate in the 2024 Paris Olympics. Per the Canadian selections process, it is unlikely his time of 2:08 will not grant him a spot on their team. In this episode, we discussed his path to 2:08, his training under the guidance of American distance great Ryan Hall, his and others decision to go straight to the marathon after college, training insight, fueling and hydration targets, why some athletes favor certain super shoes, and much more! SFuels: sfuelsgolonger.com code: BITTER5 Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Rory: World Athletics Profile - IG: @rory_linkletter - X: @ThePapaLinks YT: @LinkletterRory Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Mar 5, 2024 • 1h 40min
Episode 384: Hayden Hawks - Black Canyon 100 KM
Hayden Hawks is a professional ultramarathon athlete. His results are numerous, but include finishing second at the Western States Endurance Run 100 Mile, winning UTMB-CCC, Speed Goat 50km, and the Black Canyon 100km in course record time. SFuels: sfuelsgolonger.com code: HPOTRAIN Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Website: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Hayden: hawksrunning.com - IG: @hawks_hayden Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter