Kipchoge's milestone in Vienna, Austria, last year did not count as an official world record due to the use of "in and out" pacers and a moving drinks provider. “So for those that are against the shoe, it’s the person who is running, not the shoe. Kenya's Brigid Kosgei smiles after winning the women's 2019 Bank of America Chicago Marathon with the World Record on October 13, 2019, in Chicago, Illinois. Kosgei could not escape questions from journalists on her running shoes, and if they were the same as Kipchoge's. Paula Radcliffe with new world record holder Brigid Kosgei.

Source: Standard Digital January 15, 2020 12:59 UTC