
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

Jun 7, 2023 • 1h 52min
Episode 353: Andrew Koutnik, PhD - Low Carb Health & Performance
Andrew Koutnik, PhD joins the show to discuss two topics in detail. The emerging evidence around and against low carbohydrate approaches for exercise performance, most specifically endurance exercise, and weighing the health implications of both high and low carbohydrate diets in the context of exercise, most specifically around glucose and lipid control. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com IG: @deltag.ketones Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Coaching: zachbitter.com/coaching Andrew: andrewkoutnik.com IG: @andrewkoutnikphd Tw: @AKoutnik YouTube: @andrewkoutnikphd Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

Jun 1, 2023 • 29min
Episode 352: Proper Aid Station Navigation
This episode dives into endurance event aid stations. It looks at the planning process, and actual execution of properly using and efficiently moving through aid stations. Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com IG: @deltag.ketones Zach’s Coaching: zachbitter.com/coaching Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

May 23, 2023 • 1h 14min
Episode 351: Exogenous Ketones & Performance - Brian McMahon
Brian McMahon works alongside Professor Kieran Clarke, who has been a critical part of exogenous ketone research and formulation. Together with their team at deltaG they have produced 50+ published studies and are part of 20+ ongoing studies. This includes two very recent studies that explored exogenous ketone relationship with increasing natural levels of EPO, as well as increasing circulating dopamine concentration, improving mental alertness, and improving post exercise inflammation in endurance athletes. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com | IG: @deltag.ketones Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Coaching: zachbitter.com/coaching Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter Brian: deltagketones.com IG: @deltag.ketones

May 18, 2023 • 1h 21min
Episode 350: Historic Comeback At The Cocodona 250 Mile - Mike McKnight
Mike McKnight is an ultramarathon athlete and coach. He returns for the fourth time to discuss his historic win at the Cocodona 250 Mile. After finding himself in 73rd place, Mike rallied through the field to take the win, fueling mostly on raw milk. LMNT: drinkLMNT.com/HPO deltaG: deltagketones.com Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Exogenous ketosis increases circulating dopamine concentration and maintains mental alertness in ultra-endurance exercise Mike: lowcarb-runner.com IG: @thelowcarbrunner FB: Michael John McKnight Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

May 5, 2023 • 1h 10min
Episode 349: Keto Without The Crazy - Amy Berger
Amy Berger returns to share her approach to helping people manage keto and low carbohydrate diets. Amy has a Master's Degree in Human Nutrition from the University of Bridgeport, a Certified Nutrition Specialist (CNS), and certified Nutritional Therapy Practitioner. Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast LMNT: drinkLMNT.com/HPO Zach’s Coaching: zachbitter.com/coaching Amy: stallslayer.com IG: @tuitnutrition Tw: @TuitNutrition YouTube: @amyberger-ketowithoutthecrazy Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

Apr 28, 2023 • 27min
Episode 348: Long Intervals Simplified
For this episode, I describe a simple way to implement long intervals into your training without overcomplicating things. This may help better understand perceived effort, and create an understanding that will allow for building in more variables to future long interval sessions. LMNT: drinkLMNT.com/HPO HPO Sponsors: zachbitter.com/hposponsors Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Coaching: zachbitter.com/coaching Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

11 snips
Apr 12, 2023 • 1h 8min
Episode 347: Low Carb Endurance - Dr. Dan Plews
Dr. Dan Plews is an Applied Sports Scientist (PhD Exercise Physiology), researcher, and endurance coach. He has competed at a high level in triathlon, including an age group record at Kona. He has worked with numerous world and Olympic class athletes in the sports of rowing, kayak, and triathlon. He employs a low carbohydrate approach to his own training and racing, and with some of his coaching clients. Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Dan: endureiq.com IG: @theplews Tw: @theplews1 Zach’s Coaching: zachbitter.com/coaching LMNT: drinkLMNT.com/HPO Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance Strava: Zach Bitter

Apr 6, 2023 • 24min
Episode 346: Short Intervals Simplified
For this episode, I describe a simple way to implement short intervals into your training without overcomplicating things. This may help better understand perceived effort, and create an understanding that will allow for building in more variables to future short interval sessions. Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Coaching: zachbitter.com/coaching LMNT: drinkLMNT.com/HPO Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance TikTok: @zachbitter Strava: Zach Bitter

Mar 28, 2023 • 1h 6min
Episode 345: 2x Barkley Marathons Finisher - John Kelly
John Kelly is an ultramarathon athlete, Chief Technology Officer of Envelop Risk, holds a PhD in electrical engineering and machine learning from Carnegie Mellon, and is a father of four. Barkley Marathons is considered by many one of the hardest endurance events to complete, with only 17 total finishers and 21 total finishes in it's history. LMNT: drinkLMNT.com/HPO Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Coaching: https://zachbitter.com/coaching John: randomforestrunner.com IG: @randomforestrunner Tw: @RndmForestRunnr FB: @RandomForestRunner Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance Strava: Zach Bitter

Mar 24, 2023 • 52min
Episode 344: Endurance Training Simplified
There are a lot of ways to prepare for endurance events, and countless ways to structure workouts. For this episode, I scaled it all way down to five core intensities to work on to prepare for your next event if you are looking to get back to the basics and simplify your training, and better understand targeting different intensities in training. From here, you can add as you see fit! LMNT: drinkLMNT.com/HPO Support HPO: zachbitter.com/hpo HPO Patreon: patreon.com/HPOpodcast Zach’s Training Plans: zachbitter.com/training-plans Zach: zachbitter.com IG: @zachbitter Tw: @zbitter FB: @zbitterendurance Strava: Zach Bitter