In her teen years, Andersen won national junior titles in Norway in the
400 and
800 metres. At age 17, she set the European junior record for the
1500 metres with a time of 4:17 and won the bronze medal at the
European Athletics Championships in this event in 1974. Andersen won the British
WAAA Championships title in the 1500 metres event at the
1974 WAAA Championships. In 1975, Waitz broke the
3000 metres world record, running 8:46.6 in Oslo. Also in Oslo a year later, she lowered this record with an 8:45.4 effort, then in 1977 she won the gold medal over the distance at the inaugural
IAAF World Cup in Athletics meet in
Düsseldorf with a personal best time of 8:43.50. Two years later in
Montreal, she won the silver medal, and came to her all-time personal best of 8:31.75 in Oslo. She ran the 1500 m at the
European Championships in
Prague on 3 September 1978. The run was won by
Giana Romanova (USSR) in 3:59.01. Waitz placed fifth, with a career best of 4:00.55. It still stands as the Norwegian national record. Back then it was the eighth best time for the 1500 m. On 29 August at the Championships, she placed third in the 3000 m, with a time of 8:34.33. The winner was
Svetlana Ulmasova with 8:33.16.
New York City Marathon 1978 It was in 1978 that Waitz' association with the
New York City Marathon began; she was invited to run there by race co-founder and director
Fred Lebow, and in her first appearance, she not only won but took a full two minutes off the women's course record. On 22 October 1978, she finished in 2:32:30 more than 9 minutes ahead of
Marty Cooksey's 2:41:49. Cooksey won the San Diego Half Marathon on 26 Aug in 1:15:04. Waitz' winning time there was a world record. During 1978, the world record in the women's marathon was 2:34:47.5 set on 10 September 1977 by
Christa Vahlensieck at the
Berlin Marathon. In 1981, the 1978 NYC course was remeasured and found 151 meters short. She further improved her NYC record with her following victories in 1979 and 1980. According to the Association of Road Racing Statisticians (ARRS) Waitz had a 28 race winning streak from 22 September 1979 with a win in a 10-mile road race in Lynchburg (USA) until 8 June 1981 her win in a 3000 m track race in Basel (Switzerland). Waitz went on to win the race nine times and broke the course record three years in a row. In 1979, she won the NYC marathon in 2:27:33.
Gillian Adams was the runner up with 2:38:33. ==Personal bests==