![Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire](https://cdn.geekwire.com/wp-content/uploads/2019/10/Screen-Shot-2019-10-18-at-9.16.56-AM-630x352.png)
Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire
![Eliud Kipchoge ran a world record in the Nike Alphafly 2 – Could he have run that fast in different running shoes? | T3 Eliud Kipchoge ran a world record in the Nike Alphafly 2 – Could he have run that fast in different running shoes? | T3](https://cdn.mos.cms.futurecdn.net/bpVTYZw9UvHtgjnoVSPfyQ.jpeg)
Eliud Kipchoge ran a world record in the Nike Alphafly 2 – Could he have run that fast in different running shoes? | T3
![World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian](https://i.guim.co.uk/img/media/8dd989f70bc471a8dd2970d87c5338501bb88af1/142_217_3250_1951/master/3250.jpg?width=620&quality=85&auto=format&fit=max&s=d74e39b2a86fff22cee1f7f9a1452e65)
World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian
![Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics | BBC Science Focus Magazine Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics | BBC Science Focus Magazine](https://images.immediate.co.uk/production/volatile/sites/4/2021/08/Alamy_2F3Y8J0-crop-ff47efc.jpg?quality=90&resize=940,400)