![Usain Bolt of Jamaica holds his shoes after the men's 200 metres final at the IAAF World Athletics Championships in Daegu September 3, 2011. Bolt won the gold medal. REUTERS/David Gray (SOUTH Usain Bolt of Jamaica holds his shoes after the men's 200 metres final at the IAAF World Athletics Championships in Daegu September 3, 2011. Bolt won the gold medal. REUTERS/David Gray (SOUTH](https://c8.alamy.com/comp/2E5XEJE/usain-bolt-of-jamaica-holds-his-shoes-after-the-mens-200-metres-final-at-the-iaaf-world-athletics-championships-in-daegu-september-3-2011-bolt-won-the-gold-medal-reutersdavid-gray-south-korea-tags-sport-athletics-2E5XEJE.jpg)
Usain Bolt of Jamaica holds his shoes after the men's 200 metres final at the IAAF World Athletics Championships in Daegu September 3, 2011. Bolt won the gold medal. REUTERS/David Gray (SOUTH
![France's Sylvanie Morandais takes her training shoes after the women's 400 metres hurdles final at the XV Mediterranean Games Almeria 2005 in Almeria, southern Spain, June 30, 2005. [Morandais finished in sixth France's Sylvanie Morandais takes her training shoes after the women's 400 metres hurdles final at the XV Mediterranean Games Almeria 2005 in Almeria, southern Spain, June 30, 2005. [Morandais finished in sixth](https://c8.alamy.com/comp/2D3WFG8/frances-sylvanie-morandais-takes-her-training-shoes-after-the-womens-400-metres-hurdles-final-at-the-xv-mediterranean-games-almeria-2005-in-almeria-southern-spain-june-30-2005-morandais-finished-in-sixth-position-as-ceccarelli-won-the-gold-medal-spains-cora-olivero-took-the-silver-and-italys-monika-niederstaetter-bronze-2D3WFG8.jpg)
France's Sylvanie Morandais takes her training shoes after the women's 400 metres hurdles final at the XV Mediterranean Games Almeria 2005 in Almeria, southern Spain, June 30, 2005. [Morandais finished in sixth
![Canada's Daniel Harper carries his shoes over his head as he watches a replay of the men's 4x400 metres B final on the stadium screen during the IAAF World Relays Championships in Canada's Daniel Harper carries his shoes over his head as he watches a replay of the men's 4x400 metres B final on the stadium screen during the IAAF World Relays Championships in](https://c8.alamy.com/comp/2CY6B6P/canadas-daniel-harper-carries-his-shoes-over-his-head-as-he-watches-a-replay-of-the-mens-4x400-metres-b-final-on-the-stadium-screen-during-the-iaaf-world-relays-championships-in-nassau-bahamas-may-25-2014-reutersmike-segar-bahamas-tags-sport-athletics-2CY6B6P.jpg)
Canada's Daniel Harper carries his shoes over his head as he watches a replay of the men's 4x400 metres B final on the stadium screen during the IAAF World Relays Championships in
![Amusan shatters 100m hurdles world record to revive super shoes debate | World Athletics Championships | The Guardian Amusan shatters 100m hurdles world record to revive super shoes debate | World Athletics Championships | The Guardian](https://i.guim.co.uk/img/media/1d7775ad632098880d69889857b9d4b13d12c7ad/0_0_5797_3480/master/5797.jpg?width=1200&quality=85&auto=format&fit=max&s=0089c99df3e7feb078651b9f16e9aec8)
Amusan shatters 100m hurdles world record to revive super shoes debate | World Athletics Championships | The Guardian
![USF XCTF on Twitter: "Adriana Janic wins the high jump in the pentathlon and sits in first with 1,949 points. #HornsUp🤘 https://t.co/sv1JBmFcgF" / Twitter USF XCTF on Twitter: "Adriana Janic wins the high jump in the pentathlon and sits in first with 1,949 points. #HornsUp🤘 https://t.co/sv1JBmFcgF" / Twitter](https://pbs.twimg.com/ext_tw_video_thumb/1233436804679749632/pu/img/SRdkgTHw0wmJOQ1X.jpg:large)
USF XCTF on Twitter: "Adriana Janic wins the high jump in the pentathlon and sits in first with 1,949 points. #HornsUp🤘 https://t.co/sv1JBmFcgF" / Twitter
![Usain Bolt of Jamaica sports new running shoes after the ninth men's 100 metres heats during the world athletics championships at the Olympic stadium in Berlin, August 15, 2009. REUTERS/Michael Dalder (GERMANY Usain Bolt of Jamaica sports new running shoes after the ninth men's 100 metres heats during the world athletics championships at the Olympic stadium in Berlin, August 15, 2009. REUTERS/Michael Dalder (GERMANY](https://c8.alamy.com/comp/2E8J3YD/usain-bolt-of-jamaica-sports-new-running-shoes-after-the-ninth-mens-100-metres-heats-during-the-world-athletics-championships-at-the-olympic-stadium-in-berlin-august-15-2009-reutersmichael-dalder-germany-2E8J3YD.jpg)
Usain Bolt of Jamaica sports new running shoes after the ninth men's 100 metres heats during the world athletics championships at the Olympic stadium in Berlin, August 15, 2009. REUTERS/Michael Dalder (GERMANY
![Usain Bolt of Jamaica holds his track shoes as he celebrates winning the men's 4x100 metres relay final during the IAAF World Athletics Championships at the Luzhniki stadium in Moscow August 18, Usain Bolt of Jamaica holds his track shoes as he celebrates winning the men's 4x100 metres relay final during the IAAF World Athletics Championships at the Luzhniki stadium in Moscow August 18,](https://c8.alamy.com/comp/2CXXRPW/usain-bolt-of-jamaica-holds-his-track-shoes-as-he-celebrates-winning-the-mens-4x100-metres-relay-final-during-the-iaaf-world-athletics-championships-at-the-luzhniki-stadium-in-moscow-august-18-2013-reutersdominic-ebenbichler-russia-tags-sport-athletics-2CXXRPW.jpg)