![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/SP20_FOOTWEAR_ALPHAFLY_detail7_original_original-crop-66ba908.jpg?quality=45&resize=1200,900)
Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics | BBC Science Focus Magazine
![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=1200&height=1200&quality=85&auto=format&fit=crop&s=98149160ba44c2da042cd76503c05c40)
World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian
![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.png)
Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire
![Nike and Adidas just rolled out ultra-fast marathon shoes. But do they make sense for the average runner? Nike and Adidas just rolled out ultra-fast marathon shoes. But do they make sense for the average runner?](https://www.mensjournal.com/wp-content/uploads/mf/eliud-kipchoge-finish-line-mens-marathon-rio-2016-olympic-games-1280.jpg?quality=86&strip=all)
Nike and Adidas just rolled out ultra-fast marathon shoes. But do they make sense for the average runner?
![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_2B29CW8-crop-cd4745c-1.jpg?quality=90&resize=700,402)