This is the progression of world record improvements of the
400 metres
The 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics (sport), athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor runn ...
M45 division of
Masters athletics
Masters athletics is a class of the sport of athletics for athletes of over 35 years of age. The events include track and field, road running and cross country running. Competitors are bracketed into five-year age groups (which promotes fair comp ...
.
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References
;Citations
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;Sources
Masters Athletics 400 m list
Masters athletics world record progressions