Bolt distinguished himself with a 200 m gold medal at the 2002 World Junior Championships, making him the competition's youngest-ever gold medalist. In 2004, at the CARIFTA Games, he became the first junior sprinter to run the 200 m in under 20 seconds with a time of 19.93 s, breaking Roy Martin's world junior record by two-tenths of a second. He turned professional in 2004, missing most of his first two seasons due to injuries, but he competed at the 2004 Summer Olympics. In 2007, he beat Don Quarrie's 200 m Jamaican national record with a run of 19.75 s. In May 2008, Bolt set his first 100 m world record with a time of 9.72 s. He set world records in both 100 m and 200 m events at the 2008 Beijing Summer Olympics: 100 m record time of 9.69 s broke his own previous record of 9.72 s; with a record time of 19.30 s he broke previous record of 19.32 s by Michael Johnson at the 1996 Summer Olympics in Atlanta. In August 2009, a year after the Beijing Olympics, he lowered his own 100 m and 200 m world records to 9.58 s and 19.19 s respectively at the 2009 World Championships. His record breaking margin in 100 m is the highest since the start of digital time measurements.
As a result of Bolt's successes in athletics, he was named the Laureus World Sportsman of the Year for 2009.His achievements in sprinting have earned him the media nickname "'Lightning Bolt".
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