MONTE CARLO, Monaco -- Usain Bolt's three world records at the Beijing Olympics were officially ratified Friday by the track and field world governing body.
The Jamaican sprinter set marks in the 100 and 200 meters and ran the third leg of the 400-meter relay with teammates Nesta Carter, Michael Frater and Asafa Powell.
Bolt ran 9.69 seconds in the 100 -- while slowing down in the final 10 meters -- on Aug. 16 to beat his own mark of 9.72, set in New York on May 31. Four days later, he clocked 19.30 in the 200 to improve the record set by Michael Johnson at the 1996 Atlanta Olympics.
The Jamaican relay team ran 37.10 on Aug. 22, slicing 0.30 off a mark set by two American relay squads in 1992 and 1993.
The International Association of Athletics Federations also ratified Russian Yelena Isinbayeva's world pole vault record of 16 feet, 6¾ inches, set in Beijing. She beat her own mark of 16-6½ set in Monte Carlo on July 29.
Russian Gulnara Galkina-Samitova's steeplechase world record of 8:58.81 in Beijing also was made official.