FLAGSTAFF, Ariz. — Sara Hall knows she’s unorthodox.

She knows that other elite runners might shudder at her race schedule. She ran the Berlin Marathon on Sept. 29. She will run the New York City Marathon on Sunday. On Feb. 29, she plans to line up yet again, for the United States Olympic Trials Marathon in Atlanta.

For Hall, who is 36 and in her 14th year of competitive running, a relentless series of races separated by minimal recovery time is all part of the plan. And so far, it’s working. Hall posted a personal record for the marathon in Berlin and won the national 10-mile championship in Minnesota a week later.

“It’s become my normal,” Hall said of embracing a short turnaround between her races.

To be clear, Hall’s regimen is rare, even at the elite level. The human body is supposed to need time to heal itself after the stress of running 26.2 miles in less than two and a half hours. But it is not unprecedented. In late 2011, Meb Keflezighi, then 36, ran the New York City Marathon and then won the 2012 Olympic Trials 69 days later .

Hall decided to start following a more punishing schedule in 2015, after she ran her debut marathon in Los Angeles. She had already qualified for the United States cross-country team, which was scheduled to compete in an event in Qingzhen, China, only 13 days after the marathon, but when she finished the marathon in a disappointing 2 hours 48 minutes 2 seconds, she recalled thinking, “I’m not taking a break.” Two weeks later in China, she was the top American finisher in the 8-kilometer race.