80/20 ENDURANCE BLOG

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Why the Only Running Fitness Test I Really Trust Is a 5K Race

By Matt Fitzgerald | February 24, 2020

A study just published in the International Journal of Sports Physiology caught my attention, and I’d like to tell you about it. Conducted…

8020 Endurance Hero

Join Eliud Kipchoge and Me in Running a “Kamikaze Marathon” This Fall

By Matt Fitzgerald | May 27, 2019

Exercise scientists have two basic ways of measuring performance in their studies. One is a time trial, where subjects are…

group of athletes running for multi-pace

The Joy and Utility of Multi-Pace Workouts

By Matt Fitzgerald | February 12, 2018

Most runners target a single intensity in all of their workouts. Either it’s an easy run or long run at…

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