400 metres hurdles to 400 metres, or one lap of the stadium, and the number of hurdles was reduced to ten. The official height of the hurdles was set to 91.4 cm (3 feet) for men and 76.20 cm (2 ft, 6 inches) for women. The hurdles were now placed on the course with a run-up to the first hurdle of 45 metres, a distance between the hurdles of 35 metres each, and a home stretch from the last hurdle to the finish line of 40 metres. The first documented 400 m hurdles race for women took place in 1971. The International Association
2013 World Championships in Athletics – Women's 100 metres hurdles heat (Q) and the next 2 fastest (q) advanced to the final. Wind: Heat 1: −0.6 m/s, Heat 2: +0.2 m/s. The final was started at 19:50. Wind: −0.6 m/s. 2013 World Championships in Athletics – Women's 100 metres hurdles The women's 100 metres hurdles at the 2013 World Championships in Athletics was held at the Luzhniki Stadium on 12–15 August. In the heats and semis it was the same two names, now lined up next to each other. Brianna Rollins has set the event on fire all season long, winning the NCAA Championships in the fastest time in the