This is the progression of world record improvements of the
300 metres hurdles The 300 metres hurdles (also spelled 300 meters hurdles in American English) is an athletics or track and field event. It is a cut-down version of the International event the 400 metres hurdles. It is a standard event under the NFHS in American hig ...
M75 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
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Masters Athletics 300 m hurdles list
Masters athletics world record progressions