Olympics 2021: World records on track in athletics as spiked shoe battle between Nike, Puma intensifies
![Karsten Warholm criticises super spikes as threat to track and field 'credibility' | Tokyo Olympic Games 2020 | The Guardian Karsten Warholm criticises super spikes as threat to track and field 'credibility' | Tokyo Olympic Games 2020 | The Guardian](https://i.guim.co.uk/img/media/c78fa7f9057492c2ef1689ee37ac7801afda1890/0_365_5472_3283/master/5472.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=839bcc78dcd57809bb21ecef4af291e8)
Karsten Warholm criticises super spikes as threat to track and field 'credibility' | Tokyo Olympic Games 2020 | The Guardian
![Sage WATSON (Canada), competing in the 400m Hurdles Women Final at the 2017, IAAF World Championships, Queen Elizabeth Olympic Park, Stratford, London, UK Stock Photo - Alamy Sage WATSON (Canada), competing in the 400m Hurdles Women Final at the 2017, IAAF World Championships, Queen Elizabeth Olympic Park, Stratford, London, UK Stock Photo - Alamy](https://c8.alamy.com/comp/K00GTB/sage-watson-canada-competing-in-the-400m-hurdles-women-final-at-the-K00GTB.jpg)
Sage WATSON (Canada), competing in the 400m Hurdles Women Final at the 2017, IAAF World Championships, Queen Elizabeth Olympic Park, Stratford, London, UK Stock Photo - Alamy
![Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian](https://i.guim.co.uk/img/media/29335b2a46445a016d5b1e14cf6e745be8930abd/0_27_4000_2402/master/4000.jpg?width=1200&quality=85&auto=format&fit=max&s=87215647caab6b1367e4639ba7bf58c2)