Marathon Handbook Podcast
Why You Have to Run SLOW to Race FAST (The Science of Easy Running)
1h 6m
Why does every marathon training plan include so much easy, slow running — even when your goal pace is well over a minute faster per mile? This week, a question from listener Seth (a former pro cyclist chasing a sub-3 marathon) opens up one of our most useful conversations yet.
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Michael, Alex, and Katelyn break down the science behind easy running: zone 2, mitochondria, angiogenesis, the 80/20 rule, running economy, and why the world's best marathoners — including Eliud Kipchoge — run their easy days embarrassingly slow. They also share what easy running actually feels like in practice, how to gauge your effort without obsessing over pace, and why betraying the 80/20 rule is the fastest path to injury.
Email: podcast@marathonhandbook.comJoin Run Club and Send Us a Voice Note: marathonhandbook.com
Chapters:0:00 – Intro, Banter & What We're Covering18:07 – Listener Voice Note: Martina on German Pronunciation & NYC Events21:34 – Ad: Lagoon Sleep Pillows23:47 – Why You Must Run Slow to Race Fast (Main Topic)52:37 – Pronunciation Tangent: Capillaries, Claude & Canadian Quirks54:49 – Should You Race Again After a DNF? The Revenge Race Question1:05:55 – Outro & How to Connect With Us
