13 - The Science and Art of the Negative Split: Bank Energy, Not Time

About this episode

The episode explores the science and art of negative splitting in running, emphasizing the importance of pacing and energy management.

A deep dive into the physiology, psychology, and pacing science behind negative splitting in track and road racing, and why the fastest times are often run by athletes willing to start slower to finish stronger. Episode Description: It’s one of running’s oldest pieces of advice and one of its least trusted: don’t go out too fast. Yet every race morning, thousands of runners surge through the opening miles convinced they’ve somehow escaped physiology. The pace feels easy. The crowds are loud. The legs are fresh. Until they aren’t. In this episode of Legwork, Matt and Molly unpack why the negative split remains one of the most effective and misunderstood strategies in endurance racing. Using Matt’s Boston Marathon breakthrough as a launching point, they explore the science of pacing, glycogen depletion, lactate production, thermoregulation, muscle fiber recruitment, and why “banking time” so often turns into borrowing against a debt the body eventually collects. The conversation moves from elite marathon racing to practical pacing mistakes recreational runners make every weekend. They examine why even slight pacing errors early in a race can create cascading physiological…

People in this episode

Hosts: Matt, Molly

Topics covered

• negative split
• pacing strategy
• endurance racing
• physiology
• psychology
• glycogen depletion

Keywords

• negative split
• pacing
• endurance
• running strategy
• physiology
• glycogen
• lactate

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