80/20 ENDURANCE BLOG

blog post 63

Make Sure You’re Tired for Your Next Fitness Test

By Matt Fitzgerald | September 27, 2022

James Spragg is a young South African exercise physiologist who has carved out an interesting niche for his research. It…

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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…

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