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
300 metres hurdles 300 metres hurdles The 300 metres hurdles (also spelled 300 meters hurdles in American English) is an athletics or track and field event. It is a cut down version of the International event the 400 metres hurdles. It is a standard event under the NFHS in American high school competition and a championship level event in Masters athletics. The two iterations of the event vary somewhat. Common to all long hurdling events, the distance between hurdles is 35 metres. The high school version uses a standard 45 meter start to the first hurdle. Thus the high school race is equivalent