Anyone have a copy-and-paste of her training plan? This is like a dude going from 0:47 seconds at age 27 to 0:41 at age 32.
https://en.wikipedia.org/wiki/Jarmila_Kratochv%C3%ADlov%C3%A1Kratochvílová was a late developer, not breaking 53 seconds for the 400 metres until she was 27, and she was 32 when she set her world records.