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centers on temporal flow — his own term for fatigue resistance — and why the old story about lactic acid and H ions is outdated.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 workoutsTemporal flow & fatigue resistance: the science beyond lactic acid and H ionsThe 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 conditionsRace tactics: stay slightly off pace until 32K, then make your move in the final 10KBridge training: the difference between a sub-4 and a sub-3 runnerDisguised marathon pace: endurance spine runs vs. structural runs (80' & 90' tempos)Lactate tickles & blend workouts: safely touching 5K/10K pace without injuryA look at his Olympic athlete (18 miles at 5:10/mile) and what it reveals about the systemJohn's own comeback: from zero to pre-super base via run-walkAbout 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.