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Re:Eliud Kipchoge Breaks Two-Hour Marathon Barrier by zimpenfish on Saturday October 12, 2019 @03:28PM (#21235610)
> after the barrier has been broken, dozens followed suit.

I read an interesting article about that explaining that this wasn't really down to any kind of barriers but more having pacers and a better track (which is coincidentally about the previous 2h marathon attempt.)

https://sportsscientists.com/2014/12/2-hour-marathon-4-min-m...

Re:Eliud Kipchoge Breaks Two-Hour Marathon Barrier by buzzdenver on Saturday October 12, 2019 @05:40PM (#21236564)
That, plus having enough time for a generation of runners to blossom after WW2.