The 122nd Penn Relays at Franklin Field in West Philadelphia brought together athletes from all corners of track and field, but the record-breaking performance by 100-year-old Ida Keeling was perhaps the biggest highlight.

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On Saturday, Keeling broke the world record for the 100-yard dash for her age group (80 years and older).

"It was wonderful." Keeling said. "It's the best exercise I know."

Her trainer was her daughter, Shelly Keeling.

She has a mat. She does squats, push-ups," Shelly said. "She can do a lot of calisthenic movements where she can use her own body weight."

But she says her mother didn't start running until she was much older — after a family tragedy.