The Jamaican triple Olympic sprint champion, Usain Bolt, says he may end his record-breaking career after the 2016 Rio de Janeiro Games.
Bolt, who turns 24 in August, says his aim is to go to two more Olympics, and will probably retire after the Games in Brazil.
He says if you continue to break records, you're likely to get bored after a while and can't really accomplish anything else.
But he says he wants to be ledgend in sports, and might even try a new event like the long jump or 400 metres after the London Olympics.
Bolt is currently recovering from an achilles injury and has decided to run the 100 metres rather than 200 metres at the at the Diamond League athletics meeting in New York, to avoid further injury.
