Usain Bolt's 100-metre world record could come under serious threat later this year - though any new record won't count in the official record books.

Regan Smith set another 100m backstroke world record on Friday at the World Aquatics Swimming World Cup in Incheon, South Korea. The 22-year-old Smith set the short-course mark with a time of 54.41 ...

Usain Bolt’s 100m world record of 9.58 seconds, which was set in 2009 at the World Championships in Berlin, still stands as the fastest sprint in history. Despite advancements in track surfaces, ...

Usain Bolt’s legendary 100m world record faces a new kind of challenge as controversial developments spark fresh debate in ...