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
Top Novices' Hurdle Top Novices' Hurdle The Top Novices' Hurdle is a Grade One National Hunt hurdle race in Great Britain which is open to horses aged four years or older. It is run at Aintree over a distance of about 2 miles and 110 yards (3,319 metres), and during its running there are nine hurdles to be jumped. The race is for novice hurdlers, and it is scheduled to take place each year during the Grand National meeting in early April. The field usually includes horses which ran previously in the Supreme Novices' Hurdle, and the last to achieve victory in both