Jorun Askersrud was born in
Lunner, and represented the clubs
Lunner IL,
Oslo IL and from 1950
IL i BUL. First and foremost, she dominated
combined events in Norway during most of the 1950s. In the triathlon event—100 metres, discus throw and high jump—she finished second at the Norwegian championships of 1950 and 1951, behind
Unni Sæther and
Kirsti Jordet, respectively. Jorun Tangen then started her decade-long domination, winning every Norwegian championship through 1960 (except for 1953). Similarly, the pentathlon was inaugurated in 1951, was absent in 1952 only to return in 1953, and Jorun Tangen again won every Norwegian championship through 1960. Already in 1951, Askersrud Tangen set her first
Norwegian record in the pentathlon. The score was 2,956 points, and she particularly had a better hurdles result than the previous record holder Unni Sæther. Tangen's subsequent improvements came in 1954, 1955 twice, 1956 and 1957, bringing the record to 4,081 points, though the vast embetterment was also caused by a new scoring system. Her first and only Norwegian record in the triathlon came in 1957, which was beaten by
Karen Fladset in 1962. The next year, Tangen's national pentathlon record fell to
Oddrun Lange. Her first Norwegian record came already in 1950, running 12.6 at
Jordal Idrettspark. In 1951 she improved to 12.5 at
Bislett Stadium and 12.0 at
Trondheim Stadium. She registered 11.9 three times before achieving 11.8 seconds in October 1954–a time she equalled no less than five times. She was also the first Norwegian to receive
automatic timing in this event, which was 12.51 seconds at the 1952 Olympic Games. (The same thing pertained to her 100 metres time of 13.18 seconds, but there were no official automatic-time national records at the time.) ==International career==