400 metres hurdles technique needed to compete. As of August 2018 !Rank !Time !Athlete !Country !Date !Venue !Ref !1 !2 !rowspan=2|3 400 metres hurdles The 400 metres hurdles is a track and field hurdling event. The event has been on the Olympic athletics programme since 1900 for men and since 1984 for women. On a standard outdoor track, 400 metres is the length of the inside lane, once around the stadium. Runners stay in their lanes the entire way after starting out of the blocks and must clear ten hurdles that are evenly spaced around the track. The hurdles are positioned and weighted
Sprint hurdles at the Olympics world record has been broken only once, by Annelie Ehrhardt at the inaugural 1972 Olympic final. In contrast the 80 m hurdles world record was set at the Olympics in 1932 (four times), 1936, and 1952 (twice). Only three athletes have won two Olympic sprint hurdles gold medals: on the men's side, Lee Calhoun and Roger Kingdom, and on the women's side Shirley Strickland. Strickland is also the only athlete to win three such Olympic medals, having won a bronze medal before her victories. Alvin Kraenzlein is the only athlete to have won two hurdles medals at the same Olympics,