
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

6 snips
Feb 23, 2024 • 1h 53min
Episode 383: Brady Holmer - Endurance, Nutrition & Supplementation
Brady is a MSc in Human Performance, endurance athlete, and science writer. He publishes Physiologically Speaking on substack, and works with Examine on reviewing research in effort to help users better understand supplement and intervention evidence. Topics covered: keto/low carb endurance, periodized carbohydrate training, supplement efficacy and his work at Examine, recent half marathon personal best, exogenous ketones, strength training for endurance athletes. SFuels: sfuelsgolonger.com Free Train Product: 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 Find Brady: physiologicallyspeaking.com - X/Twitter: @B_Holmer - IG: @brady.j.holmer - Book: VO2 Max Essentials Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Feb 16, 2024 • 1h 2min
Episode 382: Allison Macsas & Nicole
This episode is the start of a series where Nicole will be interviewing a guest. The topic of this series is centered around individuals participating in sport while maintaining a highly demanding career. Allison is a four time Olympic Trials Marathon Qualifier and co-owner of Rogue Expeditions. At Rogue Expeditions, Allison creates run-centric vacations around the world. Itineraries are designed to combine authentic, off-the-beaten-track travel experiences with organized, supported daily runs in unforgettable places, and to accommodate all levels. SFuels: sfuelsgolonger.com code: BITTER5 Janji: janji.com code: Bitter10 LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones Code: BITTER20 HPO Sponsors: zachbitter.com/hposponsors HPO Website: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Find Nicole: IG: @nkbitter Find Allison: roguexpeditions.com IG: @allison_wanders Find Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Feb 6, 2024 • 1h 31min
Episode 381: Brendan Egan, PhD - Exogenous Ketone Research
Brendan is an Associate Professor of Sport and Exercise Physiology, and currently Head of School for the School of Health and Human Performance at DCU. His current research investigates skeletal muscle function and adaptation across the life course, with special interest in the synergy between nutrition and exercise interventions ranging from athletes to older adults. SFuels: sfuelsgolonger.com code: BITTER5 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 Zach’s Newsletter: substack.com/@zachbitter Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

9 snips
Jan 31, 2024 • 2h 10min
Episode 380: Dr. Mike T. Nelson - Metabolic Flexibility
Dr. Mike T. Nelson discusses metabolic flexibility in endurance athletes, exploring effects of low carb diets, balance between fats and carbs for optimal performance, and strategies for fat oxidation rates. Topics also include exogenous ketones, ketone esters, and navigating complexities in athletic performance. Gender gap in endurance races and unprecedented dominance by a female ultra marathoner are highlighted.

Jan 19, 2024 • 1h 51min
Episode 379: Jonathan Levitt - The Business Of Running
Jonathan Levitt hosts, "For The Long Run" podcast. Jonathan's career has given him insights into the athlete, creator, and company side of engaging with runners. In this episode we dive deep into how all three of these groups engage with the running community, as well as the future of running content and engagement. SFuels: sfuelsgolonger.com code: BITTER5 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 Zach’s Newsletter: substack.com/@zachbitter Jonathan: forthelong.run IG: @jwlevitt X: @JWLevitt Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter

Dec 19, 2023 • 1h 19min
Episode 378: Brian Beckstead - Entrepreneur Founder Altra Footwear
Brian is one of the original three founders of Altra Footwear. Along with Jeremy Howlett and Golden Harper, he launched the business from his garage. In this episode we discuss what it is like starting a brand and navigating the different growth stages along the way. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones HPO Sponsors: 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 Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter Brian: payaraflyfishing.com - IG: @brian_altra & @ultraflyfishing Endurance Training Series: Episode 337: The Long Run Considering the Variables Episode 344: Endurance Training Simplified Episode 346: Short Intervals Simplified Episode 348: Long Intervals Simplified Episode 352: Proper Aid Station Navigation Episode 356: Easy Run - Simplified Episode 363: Mental Training For Endurance Episode 366: Race Course Specific Training Episode 369: Speed Work Distribution & Double Threshold Sessions

Dec 6, 2023 • 1h 43min
Episode 377: Akshay Nanavati - 110 Day Arctic Crossing Project
Akshay Nanavati is a United States Marine veteran, speaker, entrepreneur, ultra runner and author. He served in Iraq during Operation Iraqi Freedom and was later diagnosed with post traumatic stress disorder. He is currently training for a never before accomplished, solo, 2700km, 110 day expedition in Antarctica. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter https://bliss.fearvana.com/greatsoulcrossing Akshay: fearvana.com IG: @fearvana Tw: @fearvanalife FB: @AkshayNanavatiFan YouTube: youtube.com/c/fearvana

Nov 29, 2023 • 1h 55min
Episode 376: Jeremy Miller - Rise Of The Hybrid Athlete
Jeremy Miller is a hybrid athlete, co-owner of Switchback, and host of the Jeremy Miller Podcast. He joined the show to chat about how he began incorporating running into his fitness goals, and what led him to dipping his toe into the ultra world. Jeremy is aiming to parlay his build up and race at the Chicago Marathon into his first flat 100km at the Brazos Bend 100km this December. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Jeremy: jeremymiller.io/ - IG: @jeremymille.r - Podcast Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter Podcast Episodes Mentioned: Episode 337: The Long Run Considering the Variables Episode 344: Endurance Training Simplified Episode 346: Short Intervals Simplified Episode 348: Long Intervals Simplified Episode 352: Proper Aid Station Navigation Episode 356: Easy Run - Simplified Episode 363: Mental Training For Endurance Episode 366: Race Course Specific Training Episode 369: Speed Work Distribution & Double Threshold Sessions

Nov 22, 2023 • 1h 14min
Episode 375: Elov Olsson - Tunnel Hill 100 Mile Record
Elov Olsson is a Swedish ultramarathon runner, who has spent his career targeting both flat runnable surfaces, as well as mountain courses. He recently raced the Tunnel Hill 100 Mile, where he broke the course record with a time of 11 hours 26 minutes 19 seconds, placing him amongst the fastest 100 mile performances of all time. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Elov: IG: @elovolsson - Strava: strava.com/pros/16646504 Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter Podcast Episodes Mentioned: Episode 337: The Long Run Considering the Variables Episode 344: Endurance Training Simplified Episode 346: Short Intervals Simplified Episode 348: Long Intervals Simplified Episode 352: Proper Aid Station Navigation Episode 356: Easy Run - Simplified Episode 363: Mental Training For Endurance Episode 366: Race Course Specific Training Episode 369: Speed Work Distribution & Double Threshold Sessions

Nov 14, 2023 • 1h 18min
Episode 374: Dr. David Heitmann - Couch To 100 Mile
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. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com - IG: @deltag.ketones HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo Zach’s Coaching: zachbitter.com/coaching Zach’s Newsletter: substack.com/@zachbitter Dave: mindofdave.com - IG: @mindofdave - YT: @mindofdaveMOD Zach: zachbitter.com IG: @zachbitter Tw: @zbitter Substack: zachbitter.substack.com FB: @zbitterendurance Strava: Zach Bitter TikTok: @zachbitter Threads: @zachbitter