Hurdling hurdle over various natural obstacles, such as logs, mounds of earth and small streams – this represents the sporting origin of the modern events. Horse racing has its own variant of hurdle racing, with similar principles. The standard sprint or short hurdle race is 110 meters for men and 100 meters for women. The standard number of steps to the first hurdle should be 8. The standard long hurdle race is 400 meters for both men and women. Each of these races is run over ten hurdles and they are all Olympic events. The men's 200 meters low hurdles event
2017 World Championships in Athletics – Women's 100 metres hurdles 2017 World Championships in Athletics – Women's 100 metres hurdles The women's 100 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on . World record holder Kendra Harrison (USA) was the slowest time qualifier to the final, while 2011 champion Sally Pearson (AUS), Dawn Harper-Nelson (USA) and Pamela Dutkiewicz (GER) were the top three fastest. It was Harper-Nelson's fifth straight championship and fourth final. In the final, Harrison was out slightly faster than Pearson, Christina Manning (USA) and heptathlete Nadine Visser over the first hurdle. Harrison held the lead until she rattled