2 Road Cyclists Riding On Street Doing Vo2 Max Workouts
By Taylor Warren
Stop Prescribing Zone 5: Build Better VO₂max Intervals

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A Woman Trail Running On Rugged Desert Terrain

How to Build Fatigue Resistance for Ultras: Lessons from Molly Seidel’s Training

By TrainingPeaks

How does a world-class marathoner adapt her training for the grueling demands of a trail 100K? In this technical breakdown, CTS Ultrarunning coach Cliff Pittman answers a series of questions to pull back the curtain on Molly Seidel’s preparation for the 2026 Black Canyon 100K. Focusing on the critical concept of “durability” — or fatigue […]

Endurance Unlimited Cover Image For Molly Seidel And Cliff Pittman

Molly Seidel and Cliff Pittman on the Shift from Running Marathons to Ultras

By Host Dirk Friel

In this episode, we dig into an inspiring athlete’s evolution, exploring the high-stakes world of elite road marathoning and the tough transition to trail and ultra running. Olympic marathon bronze medalist ⁠Molly Seidel⁠ and her coach, ⁠Cliff Pittman⁠, join us to walk us through her running journey —overcoming chronic injuries, recalibrating her goals after an […]

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