7:00 PM19:00

Keep on MARCHing...

...and dancing with Katherine at Athleta!


Come join Katherine THIS Monday, March 27th at Athleta Flatiron. I'm back for more this month at 7pm with my signature KGBody class. Click HERE for more info.  Be sure to sign up in advance to reserve your spot. 

The 1st 10 sign-ups also receive a $10 Athleta shop card!!

Sign up HERE

Can't take it to class? Then wind down your evening with Katherine's favorite bedtime yoga routine as seen on!

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6:30 PM18:30

SELF Run Club with Katherine!

Join Katherine and fellow fitness fanatics on a group run held by the SELF Run Club on Wednesday, October 19th at 6:30 PM! The run will take place from Brookfield Place in the Financial District (see map for exact location) to the Athleta Store in Flatiron, with a toning cool down class to follow. 

*Bags will be transported to finish line for all participants

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1:00 PM13:00

Katherine at Athleta

Join Katherine for her signature KGBody class at Athleta!  High energy, FUN “dance-letic” cardio and body-weight strength training. A “one and done” hour of complete mind-body fitness; This kick-butt class is also sprinkled with light elements of Yoga and Mindfulness. It’s the perfect fix for the busy go-getter who loves to work up a good sweat, sculpt a lean, sexy physique, and still have time for a few moments of silence and reflection.

Sneakers Required. Yoga Mat & Towel provided.

Sign Up HERE

*First 10 sign ups will receive a 10$ gift card!!

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to Oct 16

SELF UpNOut Studio: Community Outreach + Studio Promo

Join us at @selfmagazine’s #UpNOutStudio October 15-16 and try out some of the hottest boutique fitness classes from across the country! It's a great chance to get in a good workout and have some fun with Katherine and other like-minded fitness lovers. You can catch Katherine on:

Saturday, Oct 15 @ 11:00 am OR 3:00 pm

Sunday, Oct 16 @ 12:00 pm or 3:00 pm

 Get your tickets and learn more!

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8:00 PM20:00

YG Pink Party

The YG Pink Party brings together New York City's top fitness consumers and instructors for a night of fun, dance and celebration in support of Breast Cancer Awareness. 

Brought to you by YG Studios, Keep A Breast Foundation and featuring the incomparable Tasha Blank on the tracks, this hip hop dance fest promises to be the event of the season ... and it's all towards a great cause!

Time & Date: 8:00 PM, October 13th
Cost: SWEAT *see details below*
Location: 33 W. 17th St.
DJ: Tasha Blank

Details: Your cost for entry into the event will be SWEAT! 

You must purchase two classes from YG Studios ($56) for use with any class. (follow the link in the description to purchase)

After you purchase both classes you will receive a ticket for entry and a portion of the proceeds will go to the Keep A Breast Foundation!


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to Aug 31

Slender Summer Series

5 Training Sessions, Up to 25% OFF!!

Make this your healthiest summer yet!

5 Sessions with a KGBody Trainer for $500

5 Sessions with Katherine Greiner for $750


E-mail to get started


*Sessions must be completed before the end of August

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6:00 PM18:00

Union Square SWEAT FEST

Join Katherine for MOVE at the return of UNION SQUARE SWEAT FEST, a week-long festival highlighting the Union Square district’s vibrant health + wellness scene with Union Square Partnership. 

#GetDrenched, and pick up your SwagBag featured goodies from Athleta, SweatyBetty, Essentia, Runa, Nothin But. 

Learn more + register HERE

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11:30 AM11:30

Become the Most Magnetic Person You Know

Upgrade your mood, self-confidence, and body image

Have you been told you’re too hard on yourself? Do you struggle with feeling anxious, depressed, or underconfident? Are you a professional when it comes to finding flaws in your work and appearance, and beating yourself up?

You’re in good company! So many of us have learned the language of self-criticism, thinking it’s the only avenue to success. We might notice it makes us feel crappy a lot of the time, but we figure even if we wanted to change it, we couldn’t.

We think we’re stuck with this critical inner voice for life. We think it’s the “way we’re programmed.” But you know what? That’s simply not true. Liberation from your critical inner voice is possible, and it starts here.

  Facilitators: Megan Bruneau and Katherine Greiner 

  Will include a 1 hour workshop, 45 minute invigorating all-levels yoga class, reception with refreshments, and gift bag.

  % of proceeds will go to Safe Horizon, which seeks to "empower victims of domestic violence, child sexual abuse, sexual assault and human trafficking to move from crisis to confidence."

Location is ALOHA


HURRY, There are only 20 spots!!

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9:30 AM09:30


The hottest classes. The hottest instructors. Join for a day of FREE classes, sweaty-ready makeovers and shopping to celebrate Athleta's first ever fitness studio. Katherine will be teaching her signature MOVE by KGBody Class at 11am. Learn more HERE!

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12:00 PM12:00

Well+Good's New York City Fitness Biathlon 2015

Well+Good’s super popular fitness mashup event combines two back-to-back boutique classes at hot studios. After the workouts, everyone heads to the healthy after-party for much-deserved rejuvenation and celebration. The best part? The event raises money for charity. This year, with their biggest biathlon yet in NYC, Katherine is one of the elite Master Trainers that participants will rotate to. To benefit from Katherine's signature moves take a peak HERE.

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