100 metres at the Olympics 40 in 2000 and reached the Olympic semi-finals four years later. (Ottey is also the most frequent participant having competed in the Olympic 100 m an unrivalled six times from 1984 to 2004). The first women's champion, Betty Robinson in 1928, remains the youngest gold medallist for the event at 16 years old, while a 32-year-old Linford Christie became the oldest 100 m Olympic champion in 1992. Since introduction of testing by the IAAF in the early-20th century, female sprinters may be subject to gender verification. This rule was first formally applied to the 100 m at the 1968 Mexico
Athletics at the 2012 Summer Olympics – Men's 100 metres and 2 more world records in winning the 100m and 200m at the 2009 world championships. In the 2011 world championships, the 100 metres was won by Yohan Blake after a false start by Bolt. Later in the season, Blake ran a new 200 metres personal best only .07 behind Bolt's world record. At the 2012 Jamaican Olympic Trials, Blake beat Bolt in both events. In the final, Bolt, started slow out of the blocks and was behind Blake and Gatlin, but accelerated with 50 meters to go, to win the gold medal and was around five feet (1.5 meters)