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This week, John shares some facts about fitness! You'll learn about the dramatic rise in marathon running, though we regret to inform you we cannot explain *why* someone would choose to run a marathon. Fitness facts might not make you more fit, but they'll hopefully give you a bit more appreciation for the science (and sometimes silliness) of fitness.

Check out 100 Days: https://www.youtube.com/100days
What's your fitness age? https://www.worldfitnesslevel.org/#/

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