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
100 metres at the Olympics general. Consequently, medals from these races have not been assigned to nations on the all-time medal tables. The 100 metres is typically considered one of the blue ribbon Olympic track and field events, and of the Olympic Games as a whole. The Olympic 100 m finals, particularly the men's, are among the most popular events from any sport at the Olympics – the 2012 Olympic men's 100 metres final was the most watched event at the London Games by British audiences (with 20 million television viewers) while in the United States that event was the third-most viewed Olympic clip (and