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An exhausted athlete on a running track wearing broken green running shoes with big holes in the sole. Stock Photo | Adobe Stock
![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/SP20_FOOTWEAR_ALPHAFLY_detail7_original_original-crop-66ba908.jpg?webp=1&w=1200)
Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine
![A Pair Of Broken Green Running Shoes With Big Holes In The Sole Laying On A Running Track Stock Photo, Picture and Royalty Free Image. Image 81153050. A Pair Of Broken Green Running Shoes With Big Holes In The Sole Laying On A Running Track Stock Photo, Picture and Royalty Free Image. Image 81153050.](https://previews.123rf.com/images/arakias/arakias1706/arakias170600035/81153050-a-pair-of-broken-green-running-shoes-with-big-holes-in-the-sole-laying-on-a-running-track.jpg)
A Pair Of Broken Green Running Shoes With Big Holes In The Sole Laying On A Running Track Stock Photo, Picture and Royalty Free Image. Image 81153050.
![Ben Rund ☁️ on X: "Trying x now as @NikeService Does not react on insta. What shall I do? Broken after 1 year … a 300$ running shoe .. #running #NRC https://t.co/fFqJzqDClz" / X Ben Rund ☁️ on X: "Trying x now as @NikeService Does not react on insta. What shall I do? Broken after 1 year … a 300$ running shoe .. #running #NRC https://t.co/fFqJzqDClz" / X](https://pbs.twimg.com/media/GHRvchrXEAAWdDc.jpg:large)