A new study has been completed to establish just how Usian Bolt can run so fast.
The Institute of Pointless Research has concluded that Bolt moves his legs faster than other people.
'It's a unique skill' said Dr. Edward Longbranch.
'It seems his feet move from the back to the front quicker than his opponents. This has the effect of propelling him forward at a greater velocity.'
Asked if he could suggest any way in which other competitors could beat him, Dr. Longbranch said
'Try moving your feet even quicker than his. According to the laws of physics that should make you go faster. Oh, and not being 5ft 3 inches tall might help too.'