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
200 metres at the Olympics Campbell-Brown repeated that feat in 2008. Usain Bolt was the first person to win two Olympic 200 m gold medals at the 2012 Summer Olympics, and at the 2016 Summer Olympics he defended his title to win his third Olympic 200 m gold medal. Merlene Ottey is the most decorated athlete, having won four medals in the event (though none of them gold). Allyson Felix has won three medals, as has Poland's Irena Szewińska. Reflecting how sprint athletes often compete over various distances, many of the medalists in the Olympic 200 metres have had success in the Olympic 100 metres