His support runners in Vienna were also wearing the Vaporfly shoes. Kenya’s Kipchoge set the official marathon world record of two hours one minute 39 seconds in Berlin in September 2018, and clocked 1:59.40 in the special INEOS 1:59 Challenge event in Austria. Kenya's Eliud Kipchoge became the first person to run a marathon in under two hours. CNN has reached out to Nike for a comment but has yet to hear back. In a recent statement, World Athletics said a working group, including officials, athletes, scientists and lawyers are reviewing shoe technology and the wording of the rules.Ī decision is likely by the end of this month, but any change must be approved by the World Athletics Council, according to a spokesman. The wording also says that shoes deemed as being non-compliant “with the rules or spirit of them” could be banned from competition. Rule five adds: “Any type of shoe used must be reasonably available to all in the spirit of the universality of athletics.” The Vaporfly Next% are widely available at retail at a cost of more than $300. World Athletics’ rules say shoes “must not be constructed so as to give athletes any unfair assistance or advantage.” According to the New York Times, the top five fastest men’s marathon times in history have been set by runners in Vaporflys. While the Nike shoes are perfectly legal, an initial study in the journal Sports Medicine in 2017 suggested Nike’s original Vaporfly 4% offered a boost in running economy – the measure of the amount of work a runner must do at a given speed – of about 4% compared with another Nike model and a top trainer from Adidas.Ī New York Times study in 2018 and another independent review in February 2019 confirmed the findings.
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