Ashley Paulson added yet another record to her remarkable résumé on Saturday, running 12:47:10 for 100 miles (7:40 pace) on a treadmill at the Boston Marathon Expo, held at the John B. Hynes Veterans Memorial Convention Center in Boston. The performance smashed the previous women’s treadmill record of 14:15:08 by nearly an hour and a half.

The 44-year-old mother of four and grandmother of one from St. George, Utah, also plans to run the Boston Marathon on Monday, depending on how well her body recovers on Sunday.

Paulson, a popular coach on the iFit training platform, arrived at the expo at about 3 a.m. with her husband, Matt, who was her main support person for the event. She started running at 3:46 a.m.…