![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=380&quality=85&fit=max&s=e1525415fc02ced91eebbceadb331808)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
![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_1951/500.jpg?quality=85&auto=format&fit=max&s=28a889d4d4f52611f78c12318ab40c74)
World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | 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=620&quality=85&fit=max&s=86737c2c305f8fb235a6564621505134)
It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian
Two hour marathon: Furore erupts over Nike Vaperfly shoe worn by Eliud Kipchoge | news.com.au — Australia's leading news site
![Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/f5670c6db81bb06a5192775ad68df5503dafde3e/1191_273_2309_1386/master/2309.jpg?width=1200&quality=85&auto=format&fit=max&s=629f91429ce707c3ca1fa50df899d3f4)
Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | 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=1200&height=1200&quality=85&auto=format&fit=crop&s=c8ce1180dc69bec601e32d768dc81940)