On July 21, 2012, she became the first woman over 75 to run under seven minutes in the mile run, with a time of 6:58.44. She also holds the records for the mile run for 70-year-olds and 80-year-olds. In order to compare times across multiple age groups, masters athletics has established age graded tables based on previous results. Daprano's mile is so far beyond the scale that the time converts to a 4:00.23. The current world record for the women's mile is 4:12.56 set by Svetlana Masterkova in 1996 and Masterkova's mark is so exceptional, no other woman has been within 5 seconds of that mark since.
While she had always been active on her Iowa farm or playing basketball in high school and college in Nebraska, she didn't take up running until she started jogging on the beach while working on her master's degree in California. She spent the majority of her career just keeping active with her third grade class in Long Beach, California and didn't get into a serious jogging routine until she was 45. She finally got serious about running competitively after turning 60. Since then she has set records in each age division she has passed through. Daprano now lives in Atlanta, Georgia and runs for the Atlanta Track Club.
Daprano holds the current world records in the W70 mile, W75 400 metres, 800 metres, in addition to the pending W75 mile record. Indoors she hold the W75 records in those same events and is on the W60 4x400 metres relay. She also holds the American records in the W70 400 metres, W65 and W70 800 metres, and W70 1500 metres. And the W75 mile improves the record by so much, it is also superior to the W75 American record in the 1500, a race that is 109.35 metres shorter. Daprano's husband, about ten years her senior is also an active masters athlete and is part of two American record holding relay teams.
- "Archived copy". Archived from the original on 2012-01-11. Retrieved 2013-10-30.CS1 maint: Archived copy as title (link)
- "Archived copy". Archived from the original on 2014-10-09. Retrieved 2014-09-22.CS1 maint: Archived copy as title (link)