Fitness LIVE, Online w/ Kathy Streck


The NJ studio where it all began...

The NJ studio where it all began...

The NJ studio where it all began...


The NJ studio where it all began...

The NJ studio where it all began...


Kathy Streck, Founder/Owner/CGFI

ZK Group Fitness, LLC


email: / cell#:  856-981-7989

AFAA®  Certified Group Fitness   Instructor ~ since 2007 (Athletics & Fitness Assoc. of America) (Includes kickboxing, mat Pilates & hatha Yoga) 

Certified Aerial Yoga Instructor - 2018

Certified TRX® Instructor - 2017

Certified Spinning® Instructor ~ 2016

Certified Jillian Michaels BodyShred® Instructor ~ 2015

Certified R.I.P.P.E.D.® Instructor ~ 2015

Licenced Zumba®, Zumba Gold®, Zumba Toning®, & Zumbatomic® Instructor,Certified Turbo Kick® Instructor ~ 2009

Certified Piloxing® Instructor ~ 2009

Certified YMCA Instructor (includes mat pilates and aqua aerobics) ~ 2007

Certified Functional Pilates with Props specialty ~ 2009

Certified Qi Gong & Tai Chi ~ 2011

Sports Nutrition and Body Composition Specialty Certificate ~ 2011

Certified Behavioral & Lifestyle Coaching ~ 2011

CPR/AED & First Aid certified 

Member:  AFAA®, IDEA®, ECA®, SCW®, 

Jillian Michaels® & the R.I.P.P.E.D.® Huddle.



A bit about me personally...

The NJ studio where it all began...

A bit about me personally...

I am the Founder of ZK Group Fitness, LLC ( What started as a unique, boutique, group fitness studio established in 2008 in a small town where I grew up in Pitman, New Jersey, with 6 Instructors on staff.  Now, it is just me,  teaching classes each week LIVE, Online as well as at the beautiful Mercer Island Beach Club, Mercer Island, WA and I'm loving every minute of it!  Before getting into the fitness industry,  I graduated from The Art Institute of Philadelphia w/ a degree in Interior Design. I practiced ID for over 15 years specializing in residential and yacht interiors.

I am fascinated by the body and mind and I'm continually driven by exercise and meditation to live my life in balance. My passion is to help others live a healthy, balanced lifestyle and help them realize the power this has within. 

My personal goal, and therefore my fitness business model is to make exercise FUN while accomplishing real results! 

I am a Mom of  3 beautiful daughters and 2 very energetic Vizslas.   

We are members of the Mercer Island Beach Club and I am honored and excited to bring my knowledge, experience and enthusiasm to other members of the club as well as those who would like to be my guest at the club for some fitness fun. 

Please feel free to contact me via email or cell phone noted above. 

I look forward to meeting you!