![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/278bf5db6b5a9f9ccb47f686bc3a94c9e7c9495b/326_192_1100_660/master/1100.jpg?width=1200&height=630&quality=85&auto=format&fit=crop&overlay-align=bottom%2Cleft&overlay-width=100p&overlay-base64=L2ltZy9zdGF0aWMvb3ZlcmxheXMvdGctYWdlLTIwMTcucG5n&s=2b8dcd367642bd2908fae4f406d5d4a0)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
![Under Armour TECHNICAL PERFORMA UA W HOVR GUARDIAN 3 - Stabilty running shoes - neptune/green - Zalando.co.uk Under Armour TECHNICAL PERFORMA UA W HOVR GUARDIAN 3 - Stabilty running shoes - neptune/green - Zalando.co.uk](https://img01.ztat.net/article/spp-media-p1/138668d0397c411eaafcf549398f1e31/34d0f831099044d197d5f132eaa02058.jpg?imwidth=1800&filter=packshot)
Under Armour TECHNICAL PERFORMA UA W HOVR GUARDIAN 3 - Stabilty running shoes - neptune/green - Zalando.co.uk
![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/278bf5db6b5a9f9ccb47f686bc3a94c9e7c9495b/326_192_1100_660/master/1100.jpg?width=465&dpr=1&s=none)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
![Under Armour UA Hovr Guardian 3 Running Shoes - Running Shoes Women's | Buy online | Alpinetrek.co.uk Under Armour UA Hovr Guardian 3 Running Shoes - Running Shoes Women's | Buy online | Alpinetrek.co.uk](https://www.bfgcdn.com/600_600_90/123-0780/under-armour-womens-ua-hovr-guardian-3-running-shoes-running-shoes-detail-5.jpg)