when hand-timed marks were used for official records, or which was the basis for the official mark, rounded to the 10th of a second, depending on the rules then in place. The IAAF recognized times to the hundredth of a second starting in 1981. Note: Decker ran 4:17.55 indoors in Houston on 16 February 1980, but this time was rejected as a record due to an oversized track. Natalya Artyomova (Soviet Union) ran 4:15.8 in Leningrad on 6 August 1984, but this time was rejected as a record due to there being no international judges. Women's Indoor Women Indoor Pre-IAAF Women Indoor IAAF era See also 1500 metres world record progression References Further reading External links Runner's World data Running Times Magazine data Frankfurt University (Internet Archive) Women's progression Another women's mile progression Frankfurt University (Women's progression) (Internet Archive) Clips of Banister's 4 minute mile Video of current Men's world record by Hicham El Guerrouj World athletics record progressions Mile races