LONDON, United Kingdom Usain Bolt says he doesn't want to move up to running the 400 metres, but he will do it "if it takes that for me to become a legend in sports."

Jamaica's 100 and 200 Olympic and world champion says instead he will try to defend his titles at the 2012 London Games.

World 100 and 200 metres record holder Usain Bolt cruises to the finish line in the 400 metres in 45.87 seconds at the Camperdown Classic at the National Stadium in February.

Bolt spoke today on a conference call before the start of the Diamond League, a set of 14 races around the world that opens on May 14 in Doha, Qatar. Bolt will race at the Diamond League meets in Shanghai, New York, Paris and Brussels.

Bolt, who also holds the 100 and 200 world records, says he will compete against main rivals Tyson Gay and Asafa Powell more this year because there are no major championships in 2010.