Grace Foster is now known as "Amazing Grace".
The 91-year-old New Jersey resident has set a new world record in the 60 meter sprint, shattering the previous record for her age bracket.
Her son Greg was waiting for her at the finish line.
"When she across the line and gave me a hug, I was happy," he said. "And then the record on top of that was just a bonus."
Grace exercises daily, but didn't take up track until last month.