![An athlete wears NIKE shoes "VAPORFLY (VF)" during the 96th Tokyo-Hakone Round-Trip College Ekiden Race in Tokyo on January 2, 2020. Approximately 85 percent runners wore NIKE VAPORFLY (VF) platform shoes, so An athlete wears NIKE shoes "VAPORFLY (VF)" during the 96th Tokyo-Hakone Round-Trip College Ekiden Race in Tokyo on January 2, 2020. Approximately 85 percent runners wore NIKE VAPORFLY (VF) platform shoes, so](https://l450v.alamy.com/450v/2nrd52m/an-athlete-wears-nike-shoes-vaporfly-vf-during-the-96th-tokyo-hakone-round-trip-college-ekiden-race-in-tokyo-on-january-2-2020-approximately-85-percent-runners-wore-nike-vaporfly-vf-platform-shoes-so-new-record-updated-in-seven-sections-although-nikes-vf-has-been-attracting-attention-as-a-record-for-long-distances-on-land-according-to-british-media-vf-will-be-banned-by-a-new-rule-of-world-athletics-wa-eliud-kipchoge-world-record-holder-for-mens-marathon-and-suguru-osako-a-japanese-record-holder-wore-vf-the-yomiuri-shimbun-via-ap-images-2nrd52m.jpg)
An athlete wears NIKE shoes "VAPORFLY (VF)" during the 96th Tokyo-Hakone Round-Trip College Ekiden Race in Tokyo on January 2, 2020. Approximately 85 percent runners wore NIKE VAPORFLY (VF) platform shoes, so
![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://c02.purpledshub.com/uploads/sites/41/2021/08/Alamy_2F3Y8J0-crop-ff47efc.jpg?w=1029&webp=1)
Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine
![A photo shows NIKE shoes "VAPORFLY (VF)" in Tokyo on January 20, 2020. Although Nike ZoomX Vaporfly Next% has been attracting attention as a record for long distances on land, according to A photo shows NIKE shoes "VAPORFLY (VF)" in Tokyo on January 20, 2020. Although Nike ZoomX Vaporfly Next% has been attracting attention as a record for long distances on land, according to](https://c8.alamy.com/comp/2NRCFKD/a-photo-shows-nike-shoes-vaporfly-vf-in-tokyo-on-january-20-2020-although-nike-zoomx-vaporfly-next-has-been-attracting-attention-as-a-record-for-long-distances-on-land-according-to-british-media-vf-might-be-banned-by-a-new-rule-of-world-athletics-wa-eliud-kipchoge-world-record-holder-for-mens-marathon-and-suguru-osako-a-japanese-record-holder-wore-vf-series-the-yomiuri-shimbun-via-ap-images-2NRCFKD.jpg)
A photo shows NIKE shoes "VAPORFLY (VF)" in Tokyo on January 20, 2020. Although Nike ZoomX Vaporfly Next% has been attracting attention as a record for long distances on land, according to
![A photo shows NIKE shoes "VAPORFLY (VF)" in Tokyo on January 20, 2020. Although Nike ZoomX Vaporfly Next% has been attracting attention as a record for long distances on land, according to A photo shows NIKE shoes "VAPORFLY (VF)" in Tokyo on January 20, 2020. Although Nike ZoomX Vaporfly Next% has been attracting attention as a record for long distances on land, according to](https://c8.alamy.com/comp/2NRCFJE/a-photo-shows-nike-shoes-vaporfly-vf-in-tokyo-on-january-20-2020-although-nike-zoomx-vaporfly-next-has-been-attracting-attention-as-a-record-for-long-distances-on-land-according-to-british-media-vf-might-be-banned-by-a-new-rule-of-world-athletics-wa-eliud-kipchoge-world-record-holder-for-mens-marathon-and-suguru-osako-a-japanese-record-holder-wore-vf-series-the-yomiuri-shimbun-via-ap-images-2NRCFJE.jpg)