How Did Carrie Underwood Drop 30 Pounds Since Pregnancy?

Carrie Underwood’s secret to dropping the 30 pounds she gained over her pregnancy takes just 30 minutes. It’s her favorite workout at the moment – it’s called Tabata.   She chooses seven different exercises, like squats, lunges, or push-ups, and does eight rounds of each -- 20 seconds on, 20 seconds off for eight rounds.   Carrie says it really revs up her metabolism.  We say…obviously!

Carrie is on the new cover of Shape’s November issue, which hits newsstands on Tuesday.