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
Athletics at the 2016 Summer Olympics – Women's 100 metres hurdles Rollins. Between the fourth and sixth hurdles, Castlin got rolling, gaining and then passing Pedrya Seymour, Porter and finally over the last hurdle, Ofili. Rollins had a clear one metre victory. On the run in, Castlin came very close to Ali as Ofili gave her best desperate lean. It was an American sweep. The United States has swept the men's 110 metres hurdles six times, this was the first time for women and the first time the women's event has been swept by any country. It was also the first time that the United States has swept the medals in