Human Performance Outliers Podcast with Zach Bitter
Human Performance Outliers Podcast with Zach Bitter is a trail and ultra running podcast hosted by Zach Bitter. Interview show plus a shorter 'Run The News' commentary segment, published about weekly; interviews usually run 60 to 90 minutes, and news and solo episodes 15 to 60.
- Episodes
- 528
- Since
- 2018
- Last 6 months
- 31 episodes
- Latest
- Nov 5, 2026
What it is
An ultrarunner hosts long interviews with record-setting athletes, coaches and researchers, with a focus on ultramarathons, from backyard and multi-day formats to 100-mile trail races. A recurring news episode reviews recent race results and debates in the sport, such as fueling trends, doping and race policies. Solo episodes follow the host's own training, including his return from a blood clot.
Why listen
- Close coverage of backyard and multi-day ultras, including guests who hold records in those formats.
- Science-leaning guests on fueling, energy deficiency (REDs) and training intensity.
- Run The News episodes that react to major races within days.
Start here
- Episode 287: 100 Marathons In 100 Days - Jacky Hunt-Broersma Apr 27, 2022 Spotify · Apple
Amputee ultrarunner Jacky Hunt-Broersma talks with Zach Bitter as she neared the end of her project to run 100 marathons in 100 days. - Episode 313: Aleksandr Sorokin - Running 198.6 Miles In 24-Hours Sep 22, 2022 Spotify · Apple
Aleksandr Sorokin, holder of the ultramarathon world records from 6 to 24 hours including 100 km and 100 miles, talks about his running and his late start in the sport. - Episode 499: REDs & Body Composition | Dr. Trent Stellingwerff Aug 28, 2026 Spotify · Apple
Sports scientist Trent Stellingwerff, chief performance officer at the Canadian Sport Institute, explains relative energy deficiency (REDs) in endurance athletes and body-composition management.
Hosts
- Zach Bitter Ultramarathon runner who hosts the show and covers health, endurance, hybrid training and nutrition, per the show's description.
Recent guests
| Guest | Episode | Date |
|---|---|---|
| Meg Eckert | Episode 505: Meg Eckert Runs 636 In 6-Days Spotify · Apple | Nov 5, 2026 |
| Allison Mercer | Run The News | Moab 240 Cancellation & Chicago Marathon Spotify · Apple | Oct 13, 2026 |
| Kim Gottwald | Episode 503: Last Soul Ultra Steals The Show | Kim Gottwald Spotify · Apple | Sep 25, 2026 |
| Phil Gore | Episode 502: Backyard Ultra Records & Recovery | Phil Gore Spotify · Apple | Sep 22, 2026 |
| Brian Reynolds | Episode 501: First Double Amputee To Finish Leadville 100 Mile Run | Brian Reynolds Spotify · Apple | Sep 10, 2026 |
| Thomas Nobbs | Episode 500: The Truth Behind Run Slow To Run Fast | Thomas Nobbs Spotify · Apple | Sep 3, 2026 |
Good for
- backyard and multi-day ultra fans
- ultra fueling and physiology
- weekly ultra news
Listen
Apple Podcasts Running chart, Nov 12, 2026: #50 US, #73 UK, #59 Canada, #85 Australia. All charts
Checked Nov 12, 2026 against the show's own feed and pages. Something wrong? Send a correction. Host of this show? Claim it free.