By Heidi Pashman
February 20, 2013

Shakira, Kelly Ripa, and Sarah Jessica Parker have bangin' bodies, so when I was able to take a class from the personal trainer they all share, I was ecstatic.

Stepping into Downtown Dance Factory in New York City, I was greeted by a very petite and extremely toned woman wearing a zip-up hoodie and tight black pants: Anna Kaiser, creator of AKT INMOTION. "I just sent Kelly Ripa to climb the Empire State Building," she said casually before we went into the studio. I knew I was in for something exciting.

And the next 90 minutes didn't disappoint-in fact, a new term should be coined for working out thanks to Kaiser's classes. After attending one you'll feel like you just drank a large batch of..let's call it "motion potion." The high is incredible and the results speak for themselves.

When creating her classes "Happy Hour" and "S&M," Anna made sure that the 60 or 90 minutes you spend with her is all you need to get in your cardio, flexibility, and strength conditioning. She incorporates hip hoppin' dance choreography (that's easy to follow!) with yoga and Pilates movements and weight exercises interspersed, constantly shocking your muscles and allowing for active recovery sessions that make, literally, every second count. And they're addictive, thanks to AKT INMOTION's philosophy of "movement with a purpose."

"The majority of us spend anywhere from three to ten hours-or more-being active and working out every week. Why not develop a skill and get better at something while you are getting the best full-body workout?" Kaiser says. Plus who doesn't want to leave their workouts feeling like a back-up dancer for Beyoncé?

Kaiser began her fitness career at the Reebok Sports Club/NY and The Sports Club/LA. She then served as chief content officer for Tracy Anderson while also doing personal training. And then there's her dance experience.

"Dance has been a driving force in my life for 25 years. From music videos and hip hop, to jazz and musical theater, to ballet and classic modern dance, I have had extensive exposure to a variety of techniques that inspire my own electric style," she says. This variety includes touring with the cast of FAME!, serving as the principal dancer in the movie Enchanted, and appearing in her music videos with her client Shakira.

Good thing dance is exactly what energizes and motivates Kaiser. "There's nothing that helps clear my mind and improve my mood more than sweating in a room with my friends to some amazing new music and feeling stronger and taller every time I walk out. It's truly incredible," she says. "I'm addicted. And the results aren't half bad either."

RELATED: Cardio is not as straightforward as you think. Debunk 8 common cardio myths that could be prohibiting you from dropping pounds.

AKT INMOTION is opening a new studio this spring in New York City. The trainers-who must be NASM-certified, have at least five years' experience as a professional dancer, and more-bring a mix of expertise to the studio, including Pilates, the Czech method, TRX, and injury prevention. Sounds like a dance party to me!

For a taste of the classes at home, try out Kaiser's abs series in the below video.