This is the progression of world record improvements of the 400 metres hurdles W45 division of Masters athletics.
| Hand | Auto | Athlete | Nationality | Birthdate | Location | Date |
|---|---|---|---|---|---|---|
| 1:01.40 | Barbara Gähling | 20.01.1965 | 02.06.2011 | |||
| 1:02.85 | Barbara Gähling | 20.01.1965 | Kaiserslautern | 27.06.2010 | ||
| 1:03.85 | Christine Müller | 22.07.1958 | Zürich | 18.09.2004 | ||
| 1:04.09 | Jan Hynes | 03.04.1944 | Sydney | 01.04.1994 | ||
| 1:04.35 | Marge Allison | 13.09.1944 | Brisbane | 19.10.1991 | ||
| 1:06.02 | Marjorie Hocknell | 15.11.1943 | Eugene | 03.08.1989 | ||
| 1:07.33 | 02.01.1942 | Melbourne | 05.12.1987 | |||