Meet Carrie Underwood's New Workout Partner: Son Isaiah!

Carrie Underwood has found her new exercise partner.

While out for a jog — and an impromptu set of pull-ups on the playground — on Thursday, the new mom to 6-month-old son Isaiah Michael proved motherhood hasn’t put a damper on her fitness routine.

“Sometimes you have to work your baby into your workout … but that’s ok because the world is your playground!” Underwood, 32, captioned an Instagram of the mother and son getting their sweat on.

Dressed in a top and bottoms from her Calia by Carrie Underwood line, the “Smoke Break” singer waves to the camera as she runs down the sidewalk pushing her baby boy in his jogging stroller.

Courtesy Carrie Underwood

When he’s not pounding the pavement with Underwood, Isaiah is keeping up with his musical mama in another way. “Oh, just playing my piano in my blazer in the yard,” the American Idol alum wrote alongside a photo of her son making music.

“We’re laid-back parents and he’s a laid-back baby and … it surprised me that it’s a little easier than I thought it was gonna be,” Underwood told PEOPLE in June. “I think I just expected, like, screaming, crying baby all the time, and he’s just happy and smiley and gorgeous.”

— Anya Leon