The Sub-3 Marathon: The Complete Training System — with John Starrett

In this episode of The Aerobic Edge, coach John Starrett ("The Stable Master") returns for a deep dive into the sub-3 marathon — a magical barrier for many runners. Since 2017, John has coached a staggering 962 runners to sub-3 and 274 to sub-2:30, all online. We unpack what it actually takes to break that barrier and what your training needs to look like to get there. John explains why his approach centers on *temporal flow* — his own term for fatigue resistance — and why the old story about lactic acid and H ions is outdated. Lactate isn't the enemy but fuel; the skill lies in shuttling and reusing it. We work through his complete system, from pre-super base to the marathon block, and he shares the exact key sessions that reveal whether your sub-3 fitness is right where it needs to be. He also speaks candidly about his own comeback: after five or six years away from running, he's starting from the bottom again with run-walk intervals, with Joost as his coach. An honest look at consistency, progression, and structure — the pillars of his philosophy. **In this episode:** - Why 962 runners hit sub-3: system over isolated workouts - Temporal flow & fatigue resistance: the science beyond lactic acid and H ions - The key sessions 3-5 weeks out (16/18 miles at marathon pace) that tell you if it's "on" - Why John aims for 2:55 fitness to buffer against heat and conditions - Race tactics: stay slightly off pace until 32K, then make your move in the final 10K - Bridge training: the difference between a sub-4 and a sub-3 runner - Disguised marathon pace: endurance spine runs vs. structural runs (80' & 90' tempos) - Lactate tickles & blend workouts: safely touching 5K/10K pace without injury - A look at his Olympic athlete (18 miles at 5:10/mile) and what it reveals about the system - John's own comeback: from zero to pre-super base via run-walk **About John Starrett:** online marathon coach with a track record in sub-3 and sub-2:30, known for his emphasis on consistency, progression, and structure over "old school" hard training and exhausting VO2max sessions.