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A comment on Eliud Kipchoge Breaks Two-Hour Marathon Barrier. Parent comment

Re:Eliud Kipchoge Breaks Two-Hour Marathon Barrier by vmurthy on Saturday October 12, 2019 @04:47PM (#21236128)
The article mentions “Not open conditions”. Other words, this course was chosen for the record.

Also, per the linked Wiki reference “and meet other criteria that rule out artificially fast times produced on courses aided by downhill slope or tailwind.[8] The criteria include:

"The start and finish points of a course, measured along a theoretical straight line between them, shall not be further apart than 50% of the race distance."[6] "The decrease in elevation between the start and finish shall not exceed an average of one in a thousand, i.e. 1m per km."[6]

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Re:Eliud Kipchoge Breaks Two-Hour Marathon Barrier by u-dissolve on Saturday October 12, 2019 @04:58PM (#21236228)
I don't think the course itself breaks any criteria. It was just a big loop, so any slopes or tailwind would not help the runner. "Each lap of the course featured two 4.3-kilometre (2.7-mile) out-and-back stretches... There is only 2.4 metres (7.9 feet) of incline over the entire route."

https://en.wikipedia.org/wiki/INEOS_1%3A59_Challenge

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