Human Performance Outliers Podcast with Zach Bitter Episode 481: Multi-day & Backyard Ultras | Mark Dowdle
Mar 30, 2026
Mark Dowdle, a multi-day and backyard ultramarathon specialist and competitor, shares his journey from non-runner to durable ultra athlete. He explores what makes backyard races unique. Topics include sleep and quick-nap strategies, hourly fueling and solid-food tactics, training for unknown durations, durability over specialization, and logistical planning for multi-day events.
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Different Variables Drive Multi-Day Success
- Multi-day and backyard ultras weight different variables than shorter ultras, so specialization matters.
- Zach and Mark highlight that running efficiency matters less in multi-day events while durability, sleep tactics, and logistics rise in importance.
Avoid Overoptimizing To Reduce Harmful Stress
- Stress and over-optimization can harm training more than imperfect nutrition or planning.
- Mark stopped logging every meal because the stress of tracking outweighed nutritional benefits and harmed his enjoyment and performance.
Prepare Months Ahead To Switch Disciplines
- If you wanted to switch from fast 100-mile focus to backyard racing, spend 6–8 months shifting training and body composition.
- Zach would gain ~10 pounds, add strength, practice slow walking/running, and simulate hourly loop and nap routines.