What Shoes are You Wearing? Kipchoge, Kosgei, and The Nike Vaporfly Advantage?

I've written a couple of articles recently, and taped an NPR interview, on the subject of Eliud Kipchoge's 1:59:40 marathon, Brigid Kosgei's 2:14:04 and the fact that both were achieved in updates of the Nike Vaporfly shoes. I don't think the shoes should be banned, as they may have benefits for our daily training. But perhaps they should be restricted--the way sports fluid are restricted in the Olympic Marathon--in elite international competitions.

Here are my articles: New York Times ; Podium Runner ; National Public Radio