This is the progression of world record improvements of the 400 metres hurdles M40 division of Masters athletics.
Key
HandAutoAthleteNationalityBirthdateLocationDate49.69 Danny McFarlane 14.02.1972 Kingston 29.06.201252.62 Antônio Dias Ferreira 02.03.1960 Rio de Janeiro23.07.200052.76 James King 09.05.1949 Eugene03.08.198952.7 Stan Druckrey10.08.1948 Libertyville08.07.198954.08 Leon Hacker 26.05.1939 Hannover29.07.197954.1 George Mathe 1937 30.06.197954.3 Noel Clough25.04.1937 Gothenburg11.08.197754.8 Jim Dixon 15.03.1932 Warley27.05.197355.6 Luigi Facelli 10.05.1898 Bologna24.07.1938
References