This is the progression of world record improvements of the 400 metres M90 division of Masters athletics.
Key
HandAutoAthleteNationalityBirthdateAgeLocationDateRef1:29.15Earl Fee22 March 1929Toronto19 July 20191:29.35Yoshiyuki Shimizu14 July 1928Málaga14 September 20181:35.04Ugo Sansonetti10 January 1919Lahti28 July 20091:38.69Ernst Friedrich Mahlo5 June 1912Potsdam21 August 20021:59.76Murthy NarayanaTurkuJuly 19912:00.2 Paul Spangler18 March 18991989
References
Masters Athletics 400 m list