How far can a human run in a day?
This article explores the physiological and psychological factors that allow ultrarunners to achieve extreme endurance feats. It examines six key elements, including VO₂ max, biomechanics, and mental fortitude, through interviews with elite athletes and scientific researchers.
Why it matters
Understanding human endurance limits provides insights into sports science and human potential, influencing training methodologies for professional athletes.
In 2022, Aleksandr Sorokin ran 198.6 miles in 24 hours, nearly eight marathons in a single day — a new world record. How does anyone run that far, that fast, for that long? It turns out six factors have to be perfectly dialed in to break a distance-running world record: VO₂ max, form, footwear, fuel, environment, and the mind. To understand each one, Business Insider met with athletes and scientists who are pushing the limits of human endurance. We tracked down Kristian Blummenfelt, the Olympic and Ironman champion whose team recorded a VO₂ max of 101.1.
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