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
2011 World Championships in Athletics – Men's 110 metres hurdles next 2 fastest (q) advance to the final. Wind:<br>Heat 1: −1.4 m/s, Heat 2: −1.6 m/s Wind: −1.1 m/s 2011 World Championships in Athletics – Men's 110 metres hurdles The Men's 110 metres hurdles at the 2011 World Championships in Athletics was held at the Daegu Stadium on August 28 and 29. The final featured the three fastest 110 hurdlers in history. World Record Holder Dayron Robles took an early lead but was being passed by former record holder Liu Xiang. Between the last two hurdles, Robles' right arm backswing caught Liu's oncoming left arm. Liu hit the tenth hurdle,