No one epitomizes the glory of getting older better than Ernestine Shepherd, the world’s oldest female bodybuilder and star of our short documentary. At 77, Shepherd redefines what it means to be ripped. We saw it firsthand, in fact: A quick unzip of her workout vest revealed a row of abs any 20-year-old would envy. Being buff is a fairly recent development for Ernestine. “I was a total couch potato until age 56,” she says. But after trying aerobics, then weight training, then bodybuilding, she’s anything but. Ernestine runs 10 miles every morning, eats a ton of healthy food, and inspires her whole Baltimore community to get fit during the packed fitness classes she teaches. Catch Ernestine on Oprah Prime this Sunday, March 16, at 9 p.m. EST, where she’ll be featured in a special show on aging gracefully alongside Sharon Stone and Cameron Diaz. And be sure to watch the on this amazing woman.