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While claiming her sixth national title Emily Sisson ran an American record-breaking 1:07.11 half marathon at the USATF Half Marathon Championships in May.

She made her Olympic debut in Tokyo this summer after winning the 10,000 meters at the U.S. Olympic Track and Field Trials. In clocking a 31:03.82 in the blistering heat at Trials, Sisson broke the 17-year-old Trials record of 31:09.65 set by Deena Kastor in 2004. She finished as the top American in Tokyo in 10th place.

Sisson has been very successful in her last three trips to New York City, finishing as the runner-up at the United Airlines NYC Half twice and winning the USATF 5K Championships.

At the 2018 United Airlines NYC Half, she finished just one-tenth of a second behind Ethiopian winner Buze Diriba in 1:12:24. It was her training partner Molly Huddle who beat her out the previous year, in spite of her American debut record time of 1:08:21. She then stormed to victory in November at the USATF 5K Championships, taking the tape in the women’s race with a solo sprint to the finish in 15:38, which remains the event record.

She made her 26.2-mile debut at the 2019 Virgin Money London Marathon, finishing in sixth place in 2:23:08 to clock the fastest-ever debut by an American on a record-eligible course.

At the World Athletics Championships in 2017, Sisson once again finished one place and two seconds behind Huddle—this time over 10,000 meters. Two months earlier, she set a personal best, running a 31:25:64 at the USTAF Outdoor Championships in Sacramento. She was the top finisher at the 2016 USTAF 10K Championships and has finished on the podium in two of her three previous appearances at the USATF 5K Championships. As a two-time NCAA champion at Providence College, Sisson was a 10-time NCAA All-American and set the NCAA indoor record for 5000 meters (15:12.22). The Chesterfield, Mo., native, who has three sisters, is still coached by Ray Treacy, who guided her to three NCAA titles at Providence College.