If your idea of a workout looks more like head-banging at a rock concert than logging miles on a treadmill, then POUND may just be your fitness spirit animal. There is nothing quite like a good POUND workout: the high energy, the loud music and the most fun sweat you’ve worked up in your life. Headlining the POUND movement are Kirsten Potenza and Cristina Peerenboom, real-life best friends, business partners and all around badasses. These girls are both recreational drummers and fitness buffs – and they’ve married the two in an experience that is literally taking the world by storm. The concept behind this killer workout is simple yet genius: a full-body cardio jam session using weighted Ripstix to drum-session members slim in a 45-minute calorie-blasting blowout. And the rockin’ POUND playlists that range from hip hop to dubstep to your favorite hard rock hits? They’re sure to bring out the inner Travis Barker in anyone.

We consider ourselves group fitness connoisseurs – or at least junkies – so when we say that there is nothing like a good POUND session, we mean business. Kirsten and Cristina ooze coolness in the most authentic way, like the awesome older sister of your best friend who you idolized as a kid. Get in on the action at select gyms like Crunch and private studios from L.A. to Sydney – or, if you’re the type who’d rather pound it out at home, check out their backstage pass or newly released Album 1: Sweat, Sculpt, Rock. Get to know these raucous rockers for yourself below, then enter our giveaway to win a “Rockout Workout” of your own – Ripstix included!


Kirsten Potenza and Cristina Peerenboom.

Claim To Fame:

Creators of POUND – Rockout. Workout.™

My Specialty:

Kirsten: Hopefully being an entrepreneur!
Being awkward. And occasionally doing Ripstix stick tricks.

Moment I fell in love with fitness:

Kirsten: I fell in love with sports when I was 5 years old, the first time I stepped onto an ice skating rink. I fell in love with fitness when Cristina and I taught our very first class. It was the first time fitness felt right.
Cristina: The day Kirsten and I taught our first informal class.

Favorite class to take when not teaching:

Kirsten and Cristina: POUND – our instructors are so inspiring and fun! – and any masculine-style dance class.

When you leave my class, you feel:

Kirsten: Empowered, strong and full of positive energy…and sweaty.
Cristina: Sweaty, elated, energized and empowered.

My secret weapon:

Kirsten: Going with my gut. I always listen to that thing.
Cristina: Siri.

Go-to workout gear:

Kirsten: Our new POUNDline hoodie, Rebecca Michaels or Split 59 leggings and Nike FlyKnit kicks!
Cristina: Leggings from Rebecca Michaels and a POUND POSSE tee!

In my gym bag:

Kirsten: Frends Headphones, Eos Lip Balm, Aveda tinted moisturizer and Ripstix!
Cristina: Ripstix, Frends headphones, and a keychain with a zillion keys and keychains on it.

Biggest inspiration:

Kirsten: My mom and dad – two of the most innovative, creative and hard working people I know. My boyfriend, Jeremy. Our incredible instructors. And, of course, Cristina – C-BOOM!
Cristina: Bill Nye and Bob Ross. And Kirsten.

Favorite workout move:

Cristina: The pelvic bridge (aka T and A position in POUND…it stands for thighs and ass, by the way.)
Kirsten: I second that!

Fave post-workout snack:

Kirsten: Coconut water and sesame honey almonds.
Cristina: Greek yogurt with berries.

Favorite way to hydrate:

Kirsten and Cristina: The Starbucks “POUND Special,” which we hope is a real “thing” someday: a humongous-sized unsweetened iced black tea, Cool Lime Refresher, and water. We fill up the empty cup with h20 for the rest of the day. (And also pee excessively for the rest of the day.)

When I'm not POUNDing, I'm:

Kirsten: Cooking, listening to music, decorating or getting outdoors!
Cristina: Hanging with the man and exploring West LA.

Fave quick workout outside the studio:

Kirsten: My bike ride to work everyday! C. and I also have 5-minute dance parties, where we dance as crazy as we can for an entire song…it gets weird…and sweaty.
Cristina: Power walking through a sketchy neighborhood.

Latest healthy obsession:

Kirsten and Cristina: Juicing! And we’re in luck – Pressed just opened up a few blocks from our houses! Wahoo!

Current Mantra:

Kirsten: Everything is as it should be.
Cristina: Listen more, speak less.

Win A Rockout Workout!

One lucky reader will win a copy of the two-disc POUND: Rockout. Workout. DVD, complete with a pair of Ripsticks! Like both the Chalkboard and POUND Facebook pages, and leave a comment telling us what makes you feel like a rockstar! 

Giveaway ends 1/31/14 at 5pm PST Rock on!

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From our friends


  1. Crossing every thing off my to-do list, and still having time for a Tru Blood marathon. Rockstar status 🙂

    Simi Botic | 01.27.2014 | Reply
  2. This is rocking my world right now

    Miss b-RyaN | 01.27.2014 | Reply
  3. Love, love, love teaching Pound! I wake up excited on the days I teach!

    Denise | 01.27.2014 | Reply
  4. Keeping up with my goals (right now is about exercising, driking more water, and eating more healthy) and showing everyone that I can do anything.

    Limari Colon | 01.27.2014 | Reply
  5. love teaching Pound!! channeling my inner rock star and encouraging others to do so as well…and i cant wait to try the pound from starbucks!!! 🙂

    Emily | 01.27.2014 | Reply
  6. C & K have got me hooked on the Pound special from Starbucks! Has me feeling great and ready to take on the day like a true rockstar – Go Pound!

    Angela Mayhew | 01.27.2014 | Reply
  7. 2014 is the year for me to be truly healthy overall. Teaching Pound 5 times a week makes be happy, definitely will make me more fit and also motivates me to have a healthy diet and lifestyle. Thanks to my inspirations -K &C.

    Cynthia Demorest | 01.27.2014 | Reply
  8. I have been wanting to try POUND for quite some time now to change up my routine. I still have weight to lose and looking for a fun workout to help shed the weight. I live in OH and have not seen any classes around me being offered! Hope to one day be able to check it out.

    Kristen Huntley | 01.27.2014 | Reply
  9. Finishing a killer workout! I can’t wait to try POUND!

    Lilly | 01.27.2014 | Reply
  10. Rocking out in pound class. It is my new favorite workout. Right up there with spin. Even had to have my own rips ticks to take to class with me.

    Erin perry | 01.27.2014 | Reply
  11. I love that everyone no matter the fitness level leaves an amazing POUND session with a huge smile and looking forward to the next one!!!! Empowerment, strength, sweat, and fun!!!!

    Lisa | 01.27.2014 | Reply
  12. How totally cool is this. Have never tried POUND, but am interested in giving it a try. Learning to workout for the health of it and not to reach a magic number on the scale. Hard and scary lesson to learn, but I know life will be better.

    Paula Hunt | 01.27.2014 | Reply
  13. dancing around the house when i clean and of course the arms to I wont be ignored during pound!!!

    lauren | 01.27.2014 | Reply
  14. Getting thru a Pound Workout and wanting more makes me feel like a Rock Star! I love how this exercise leaves you exhausted and sweaty but still wanting more every time.

  15. I feel like a rockstar every time I achieve something (working out or otherwise) I previously told myself I couldn’t do. The mind is really powerful and by just believing in yourself, you’ve overcome the biggest hurdle to achieve it! POUND looks like a great workout! I would love to try it!

    Donna F. | 01.27.2014 | Reply
  16. Just experienced Pound at the evolution conference in LA and all I want to do is pound the floor to a Rage Against the Machine song again. And I truly feel sucked in from all directions like they said. I’m in love.

    Mandi | 01.27.2014 | Reply
  17. This format looks amazing! A chance to be a rock and roll drummer while getting fit?! I’M IN!!

    Cynthia Toothman | 01.27.2014 | Reply
  18. I cant wait to join the pound posse! These chics and workout=absolutely amazing!!

    Kaitlyn Faz | 01.27.2014 | Reply
  19. Pound is an awesome workout!!! I feel so great each time in finished with the pound workouts

    Nikki ferguson | 01.28.2014 | Reply
  20. Working out, and feeling STRONG because of it makes me feel like a RockStar! Just found POUND and I’m so excited to rock out to this new fitness sensation, AND found your site, which is equally amazing!! It’s been a great day! 🙂

    Nancy | 01.28.2014 | Reply
  21. Feeling accomplished for the day (e.g. quality family time, great work day, etc) complete with good eating and a great workout! Overall, just living each day to it’s fullest!

  22. Can’t wait to try this rockin’ workout!

    Jennifer Davis | 01.28.2014 | Reply
  23. Thanks so much for the giveaway! This looks like an awesome workout! I feel like a rockstar when I manage to fit in a workout and get to spend time laughing with friends.

    Christina | 01.28.2014 | Reply
  24. When my friends and family enjoy a meal I have prepared – I feel like a rockstar.

    Kate | 01.28.2014 | Reply
  25. I most feel like a Rockstar during Killing in the Name of! Love it…

    Melissa | 01.28.2014 | Reply
  26. Jamming to a good song on a run and eating healthy makes me feel like a rockstar. Pound workouts seem like just what I need to mix up my exercise routine and pump up my energy!! Would LOVE to win this and try it out!

    Samantha G | 01.28.2014 | Reply
  27. I feel like a rockets when I wake up early and I’m able to be productive that day, working out, smoothie and I’m ready to take on the day. rock star status!

    elena | 01.28.2014 | Reply
  28. I feel like a rockstar when I finish up an awesome workout and then have tons of energy to knock out the rest of my to-do list!

    Jenny | 01.29.2014 | Reply
  29. After a packed day of teaching and training nothing makes me feel more like a rockstar than coming home and dancing around with my two year old when I feel like I should be crashed on the couch.

    Betsy | 01.29.2014 | Reply
  30. I feel like a rockstar when I get off work and eliminate 8 hours of sitting at a computer with 1-2 hours of a hard, FULL workout! (I also feel like a rockstar when I meet my sales quota!)

    Catie | 01.30.2014 | Reply
  31. I felt like a rockstar after begging people to go to the pound class in Oregon ,everyone say no but I drove an hour and 15 minutes anyway to join Nani in the POUND class. AMAZING !! The whole way home after my hour and a half class, I played my pretend drumsticks as I was driving down the freeway and the back roads to my home to the music yes I felt like a ROCKSTAR!!

    Heather jones | 01.30.2014 | Reply
  32. Started the pound classes online and I LOVE them!! Became a member and the workouts are great – THANKS for a new workout that is never boring!

    Marilyn M. | 01.30.2014 | Reply
  33. I feel like a rockstar when I nail a sequence in class (after weeks of trying) or when my son and husband really love a meal I experimented with

    Kelly @ Cupcake Kelly's | 01.30.2014 | Reply
  34. I feel like a rock star when i’m at a pound session

    todd | 01.30.2014 | Reply
  35. I feel like a rockstar when I accomplish my goals and when I dance around to my favorite songs.

    Lianca | 01.31.2014 | Reply
  36. Just recently certified as a PoundPro in NY and brining it home to my Fitness Studio…. Pound has totally brought me out of my shell and is raising the bar in fitness for woman of all fitness levels like no other! LOVE IT!!!!

    Lisa | 01.31.2014 | Reply
  37. I feel like a rockstar when “My Songs Know What You Did in the Dark” finishes at Pound and I not only survived but know that I killed it. Also always during Rachel’s hip hop class on Tuesdays at Crunch Lafayette because it’s literally a giant dance party and I swear we’re all ready to be Beyonce’s back up dancers.

    Jewlie | 01.31.2014 | Reply
  38. POUND fit is awesome!! Love rocking it out!

    Mandy Cortez | 01.31.2014 | Reply
  39. pound keeps me feeling like a rockstar all day! ripsticks=rippedchicks~~woohoo

    lisa | 01.31.2014 | Reply
  40. The best on the market! I teach water aerobics and love it,love going up stairs to take POUND fit EVERY chance I get! Hoping to become a trainer soon!Very sore after,but oh how good it feels!!!

    Mandy Cortez | 01.31.2014 | Reply
  41. Love this! And love Pound! It’s a serious Rockout workout that doesn’t feel like it. I always leave wanting more!!

    Pamela | 01.31.2014 | Reply
  42. How does POUND make me feel like a rock star? In every way possible to be honest. The very first time I tried it out at a local fitness studio.. I fell in love. I love to dance, so being able to dance to awesome music and using the ripstix to get an amazing workout in makes it that much more fun! I wish I could have the POUND DVD to be able to do it from home. That would be perfect! I can’t always get to the fitness studio because I work too late, so being able to have it at home would be so much more convienant to me. I get super upset whenever I can’t make a POUND class at the studio. I really do look forward to it, it’s like the only workout I actually look forward to doing. I’m so thankful and happy I found out about it! It makes me feel accomplished, refreshed, stress free, and my whole body just feels amazing after each workout. So if I could win this POUND DVD, I would feel like the luckiest girl in the world! … I never win anything, and I knew entering this it was for something that I’m compassionate about so I tried my very best to give it my all in this comment. Please pick me!!

    A'drianna Gomes | 01.31.2014 | Reply
  43. Love pound. It’s like an amazing addiction that you can’t get enough of. I think it’s a great work out and it makes me want to get off my butt and do it!!!

  44. Getting certified in Pound has definitely brought out my inner rock star even though my groupies aren’t fully potty trained (I practice a lot in my kid’s playroom, is it wrong my 4 and 2 year old like to rock out to Rage against the machine?)

    Brie | 01.31.2014 | Reply
  45. These girls are the real deal! As genuine as they come! I am a PoundPro in Connecticut and I own a fitness center! My members LOVE Pound! It’s fun, different, gets your stress out big time and it’s an amazing workout! I will put Pound on the map in Connecticut ! I was recently asked to teach at a huge music store!! Everyone loves it! I don’t leave home without my ripsticks! Thanks for showcasing these great girls!!!

    Karin marinaro | 01.31.2014 | Reply
  46. LOVE teaching POUND and being a part of the POUNDpossee and being bootylicious thanks to POUND-Rockout.Workout!

    Erica Martin | 01.31.2014 | Reply
  47. I love POUND and I’m really hoping to start my own studio where I would offer classes!! I did the POUND training few months ago and love it!!

    Vicki Neibert | 01.31.2014 | Reply
  48. Can’t wait to get certified in POUND! Dallas here I come!

    Destini English | 01.31.2014 | Reply
  49. This was by far the best aerobic certification I have ever had.

    Janelle | 01.31.2014 | Reply
  50. Come POUND in Arizona ladies!!! please? 🙂 #poundicted

    Vanessa Moraila | 01.31.2014 | Reply
  51. Love the POUND girls for bringing such a unique and amazing workout to the fitness industry!

    Kim maxwell | 01.31.2014 | Reply
  52. BEST workout ever! I love K + C for creating such an amazing class and it has introduced some awesome people together. Great community of #poundposse

    Mandi Tom | 01.31.2014 | Reply
  53. OMG almost time to close the contest! Love you to pieces, c+k!#poundposse

    Viviana | 01.31.2014 | Reply
  54. Cristina looks as beautiful if not more so than she did in high school! I’m so happy that she has found a best friend that shares her passion and sense of humor. These girl’s are awesome and their kindness and quirkiness has brought them the to this level of success. I am so happy for you guys!

    Jacque | 01.31.2014 | Reply
  55. Love you two!

  56. I have heard so many great things about pound and I feel like it would be that extra little push I would need to reach my goal weight!!!!!!!

    Carissa | 01.31.2014 | Reply
  57. There is NOTHING like POUND ROCKIN OUT & Breaking a RIPSTIX during your FAVORITE song~! 🙂 Love this Amazing, Fun, Sweat Fest every time~! 🙂 #beyourownrockstar <3

    Reta Ptak | 02.01.2014 | Reply
  58. POUND makes doing squats FUN!!! You girls rock!

    Emily | 02.01.2014 | Reply
  59. I wrote a comment on 1/27 it said …. “My amazing girlfriends and their support with what’s rocking my world right now”. I saw it post in the comment section on 1/27 it was the third comment from the top. I went on the POUND FB page and noticed the shout out for the contest. For whatever reason I decided to come back to the article and then I noticed my comment was missing. Any idea what happened?… Still possible to be included?… Please contact me via the email address listed … I’m very interested in your response/thoughts. Thank You!

    Pamela | 02.01.2014 | Reply
  60. I wanna be a Pound Pro!!

    Garrett | 02.01.2014 | Reply
  61. I love POUND!!!!….I could hammer for hours straight with a DVD…nuff said!

    Patricia | 02.01.2014 | Reply

    The Chalkboard | 02.02.2014 | Reply

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