Workout helped Carrie Underwood get back in shape after baby birth

Los Angeles: Singer Carrie Underwood's trainer, Erin Oprea has revealed that the new mother did intense workout to kick her pregnancy fat.

The 32-year-old Grammy winner, who welcomed son Isaiah Michael in February, showed off her post-baby body in a photo shoot four months after giving birth, reported People Magazine.

Oprea said, a typical workout session for the singer included "a warm up and a cool down."

"Sometimes we'll go for a run with lots of hills, stop at a park to do some pull ups, push ups, step ups and other fun body weight stuff," she added.

Calling her client a "super motivated person with big goals," Oprea said the key was to "keep it fun and keep shocking the body."

"No two workouts seem to end up the same."