Nike’s Controversial New Zoom Vaporfly 4% Shoes Made Me Run Faster
I thought we were talking about doping; Haile Gebrselassie thought we were talking about shoes. It was November 22, 2012, and we were sitting in Gebrselassie’s eighth-floor office in Addis Ababa, Ethiopia, on a warm afternoon, locked in a long discussion about the limits of a runner’s body. Gebrselassie is not only a double-Olympic gold medalist with two marathon world records to his name; he is also a gregarious and provocative aficionado of the sport. So I asked him: What did he consider the best time a clean athlete could run for the marathon?