Your mind quits before your body does. That's where most people fail. World-record ultra-endurance runner and endurance coach Zach Bitter sits with Joe De Sena to talk about what breaks people when the miles stack up. Discipline under load. Mental control past mile 60. The rules that keep you moving when quitting makes sense. They cut through ego, impatience, and comfort, explain how to manage mental breakdowns, and show why comfort destroys performance. Things You Will Learn

• How to hold the line when your mind tells you to stop
• How to manage fatigue without negotiating with yourself
• How to build endurance through structure, not motivation

Tools & Frameworks Covered

• Zoom Out / Zoom In Rule: keeps you moving by shrinking the problem and controlling focus
• Low-Intensity Discipline Model: builds endurance without burning out or quitting early
• Anti-Comfort Execution Rule: removes easy exits to maintain forward momentum

If this episode moved you, don't just listen. Do something about it. Sign up. Show up. Do the work. Spartan.com. No more excuses. Zach Bitter is an American ultramarathon runner who set world records in the 100-mile and 12-hour runs, showcasing the limits of human endurance. A former collegiate athlete turned elite ultrarunner, Zach has built his career around disciplined training, mental toughness, and strategic performance. As a coach and podcaster, he helps others develop resilience, focus, and sustainable methods for peak endurance. Connect to Zach: Website: https://zachbitter.com Instagram: https://www.instagram.com/zachbitter YouTube: https://zachbitter.com/hpo