I stumbled on a documentary: "The Tarahumara - A Hidden Tribe of Superathletes Born to Run"[0] that goes specifically into that. Basically, these people run 40

I stumbled on a documentary: "The Tarahumara - A Hidden Tribe of Superathletes Born to Run"[0] that goes specifically into that. Basically, these people run 400 miles or something bare feet. [0]: https://www.youtube.com/watch?v=FnwIKZhrdt4 https://www.youtube.com/watch?v=FnwIKZhrdt4