But not every runner sees improvement in time. so-called non-responders exist at the elite level but I don't recall seeing any analysis as to why some runners r

But not every runner sees improvement in time. so-called non-responders exist at the elite level but I don't recall seeing any analysis as to why some runners run faster and others don't with these carbon-plate shoes. [edit] a quick search found this article about supershoes and the range of response - see https://run.outsideonline.com/gear/super-shoe-hyper-responder/ https://run.outsideonline.com/gear/super-shoe-hyper-responde...