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What running ultramarathons and giving birth tell us about the limits of human endurance
What running ultramarathons and giving birth tell us about the limits of human endurance,Runners on the 3,080 mile Race Across the USA in 2015. A group of researchers studied people who ran across the United States over a five-month period to understand the limits of human endurance.

What running ultramarathons and giving birth tell us about the limits of human endurance

Runners on the 3,080 mile Race Across the USA in 2015. A group of researchers studied people who ran across the United States over a five-month period to understand the limits of human endurance.