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 1956 Summer Olympics – Men's 100 metres seven Heat eight Heat nine Heat ten Heat eleven Heat twelve The fastest three runners in each of the four heats advanced to the semifinal round. Heat one Heat two Heat three Heat four The fastest three runners in each of the two heats advanced to the final round. Heat one Heat two Key: =OR = Equalled Olympic record; DQ = Disqualified Athletics at the 1956 Summer Olympics – Men's 100 metres The men's 100 metres sprint event at the 1956 Olympic Games in Melbourne, Australia, was held at the Melbourne Cricket Ground on 23 and 24 November. The final