![IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian](https://i.guim.co.uk/img/media/5b565649b2e231edfd00ebbe32d49e4648b49553/338_640_2787_4832/master/2787.jpg?width=445&quality=85&dpr=1&s=none)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
![Nike's two-hour marathon project reveals technological inequities in sport | Roger Pielke Jr | The Guardian Nike's two-hour marathon project reveals technological inequities in sport | Roger Pielke Jr | The Guardian](https://i.guim.co.uk/img/media/6b24cf0955ab3733b45ca6db05ae101fe6bfc45d/0_160_1600_960/master/1600.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=0480ac526cc8cd4b92673c7ec75705e4)
Nike's two-hour marathon project reveals technological inequities in sport | Roger Pielke Jr | The Guardian
![It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian](https://i.guim.co.uk/img/media/cc8d03039454c146ddf523d17bce945e38b8b238/0_286_3204_2434/master/3204.jpg?width=465&quality=85&dpr=1&s=none)
It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian
![Nike stirs the pot with 'gamechanger' running shoe in step with new rules | Athletics | The Guardian Nike stirs the pot with 'gamechanger' running shoe in step with new rules | Athletics | The Guardian](https://i.guim.co.uk/img/media/88944abba122485af1bbcadbab61a324bb2ee3eb/1027_1999_2593_1556/master/2593.jpg?width=465&quality=85&dpr=1&s=none)
Nike stirs the pot with 'gamechanger' running shoe in step with new rules | Athletics | The Guardian
![Nike's high-tech, record-breaking Vaporfly marathon shoes should be banned, Rob de Castella says - ABC News Nike's high-tech, record-breaking Vaporfly marathon shoes should be banned, Rob de Castella says - ABC News](https://live-production.wcms.abc-cdn.net.au/8cb6c5f08f8285a29b263693bd4f6b1e.jpg?src)