Prior to the time that she started to run, Irvine did not regularly exercise. who was concerned about Irvine's condition physically. Her initial strategy was to alternate between walking and running, depending on the availability of shade. Irvine's first race at a longer distance was a 15-kilometer run at a park; she posted the second-fastest time among the women who took part. In the previous year, Irvine had run in the
Boston Marathon, winning the women's 50–59 age group in a time of 3:11.00. Many records for female runners over 50 years old were set by Irvine. She was the first woman in her age group to run for under 20 minutes in the 5-kilometer run, 38 minutes in the 10-km, and 3:00 in the marathon. In 1983, Irvine competed in the California International Marathon, held in
Sacramento, California. Her time of 2:51.01 set a world record for female runners over 50; it was over eight seconds faster than the previous record time, which she held, and about 13 minutes ahead of the next-fastest time by an over-50 woman. Of the 268 women who ran at the Trials, she ended up in 131st place. Regarding the experience, Irvine said, "I knew the trials would be my Olympics." Nicknamed "The Flying Nun", Irvine gained recognition from her U.S. Olympic Trials run. In one event held in Europe, the 1985 World Veterans Games in Rome, Italy, Irvine earned four medals: one gold and three silver. She often
rowed indoors with an ergometer. ==Later years and legacy==