Celebrity Trainer on How to Keep Healthy in New Year

Anna Kaiser shares her secrets to help you stay in shape for 2014.
3:00 | 01/09/14

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Transcript for Celebrity Trainer on How to Keep Healthy in New Year
All right. Good news guru anna kaiser is with us. Her clients include sarah jessica parker, kelly ripa, shakira, what do they all have in common? They're all hot and healthy and anna revealing her sexiest star secrets. First, abc's deborah roberts visited one of her high-impact workout classes. Take a look. Reporter: It was a photo seen around the world that set celeb fitness watchers buzzing. We didn't know it would go viral. Reporter: Kelly ripa's tweet of her killer abs. Pretty crazy for a mom of three and the woman who helped her get a ripped stomach. Anna kaiser who trains a roster of celebs from kelly to sarah jessica parker, even singer shakira seen here on "self" magazine five months after giving birth. At her new york city studio kaiser's rocking it with make no mistake this dance class is a full body workout. I wanted a one-on-one session to find out how she got that stomach of steel. Walk it out so that your feet are on the ball stabilizing with your left leg as you bring that right toe to touch the ground. And while we're at it what about shakira's sexy hips that don't lie. Bring your booty up. You'll drop that left leg underneath and you're going to press up with that left leg. Is this allowed on television? Of course, I had to know the secret behind sjp's seriously sculpted arounds. Drop those shoulders. Pull your navel to your spine. Elbows out. Bring them out to the side. There you go. Nice. All great tips but sadly there's one big one we all have to follow to make any workout pay off. Portions. That's the best you can do ever for your weight. Reporter: For "good morning america," deborah roberts, abc news, new york. They are moving and anna kaiser is with us now with three of her trainers, good morning to you all. And I mean looking at the celebrities that you work out, the one thing that they have in common is they're not only in great shape but also look very healthy. How do you do that. You need a combination of cardio, strength and flexible. Don't want to focus too much on one thing because you want the full body results. Toning, lengthening, lean, all of it. So many of us think I'll just get on the treadmill. Drop the weight. That's not. You need everything. We saw that picture of kelly ripa not too long ago. Kelly ripped as I now call her looking so fantastic. Okay, so new year's resolutions. How many people I'm sure here right in the studio have said it's weight loss, it's getting in shape. What can we do to make it stick? Don't go overboard. I'm going to take everything out of my diet and work out every single day especially if you haven't been working out, it's not going to happen. You can do this at home. I just learned it two seconds ago. And I have on heels. All right. Really low. Twist those heels. Twice, yeah. Do it again. 20 times. Yeah. I'm doing it twice. I just did it. I'm good. It's a great chance and your sexy star secret. What did you learn from the celebs? Be committed. Come to your workout and do the heel click. There's no place like home. Be committed. Don't go overboard. And just really have fun. You know, have fun. Enjoy your workout. You make it fun. You make it fun, anna kaiser, get three of her top hitness tips on goodmorningamerica.Com on yahoo!

This transcript has been automatically generated and may not be 100% accurate.

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