Cookies on the Merrithew website
Merrithew has updated its cookie policy. We and third-parties use cookies on this site to improve your experience, personalize content, optimize your shopping experience and to show you relevant advertising. By continuing to use this site you give consent for all cookies to be stored locally on your computer or device. To learn more about cookies and how to manage them visit our cookie policy.

Instructor Trainer bios

The Merrithew Faculty, or members of our esteemed team of Instructor Trainers, is made up of highly qualified and internationally sought-after educators who are known for their dedication, professionalism and attention to detail. All of our faculty members hold full certification in the STOTT PILATES® method and have achieved additional designations to complement their training. A diverse group, they come from various backgrounds including physical therapy, exercise science, athletic therapy, dance and group and personal fitness training to name a few. Every member of the team strives to uphold the highest standards of training that have been developed worldwide.

Marsha Warnke

Marsha Warnke

Floating IT
Salem, Oregon, USA

IT qualifications
Matwork, Reformer, Cadillac, Chair, Barrels, ISP, Total Barre®

Additional credentials and designations
MS, ACSM, Gyrotonic and Gyrokinesis

Bio

Marsha received her certification as a STOTT PILATES® Instructor in 2001, and became an Instructor Trainer for Merrithew™ specializing in STOTT PILATES in 2008.  Marsha has always had a passion for body movement and dance, having spent over twenty years as a professional ballet dancer, instructor and choreographer.  She holds a Masters of Science Education in Exercise Physiology from the University of Kansas, and is a certified Clinical Exercise Physiologist and Health Fitness Specialist through the American College of Sports Medicine.  Marsha brings her extensive knowledge of anatomy, as well as a genuine enthusiasm for bodywork to each workout.  

Marshall Eklund

Marshall Eklund

Marshall Eklund Fitness & Pilates
San Diego, California, USA

IT qualifications
Matwork, Reformer, Cadillac, Chair, Barrels, ISP, SPX

Additional credentials and designations
MA

Bio
Known for his clinical knowledge, endless humor, and abundant energy, Marshall earned his first fitness certification and began training clients in 1986.  He holds a Masters degree with a special emphasis in Biomechanics and Athletic Training and has been an Instructor Trainer for Merrithew™ specializing in STOTT PILATES®

and a Licensed Training Center owner since 2002.  Marshall presents on behalf of Merrithew and is the proud owner of Marshall Eklund Fitness & Pilates.  The studio opened in 1998 and has been featured in San Diego Magazine’s “Best of San Diego”.  Marshall divides his time between client assessment, staff development, instructor training, and writing.

See where I teach

Marta Yuste Vaquerizo

Akrostudio
Toledo, Spain

IT qualifications
Matwork & Reformer; Rehab; Halo® Training

Bio

Marta began her training with STOTT PILATES® in 2005, and became a certified Instructor Trainer for Merrithew in 2007. She currently works teaches education at Akrostudio, a Licensed Training Center for Merrithew.

See where I teach

Martha Kittle

Brunswick, Maine, USA

IT qualifications
Matwork, Reformer, SPX

Additional credentials and designations
ACE, TRX

Bio

Martha has been teaching fitness since 1984 (over 30 yrs!). Martha began studying Pilates in 2001, earned her full STOTT PILATES® certification in September 2004 and soon after became certified as an Instructor Trainer for Merrithew™, specializing in STOTT PILATES, (the only Pilates instructor in Maine to earn this status!) She has trained at the STOTT International Training Center in Toronto, and at Northeast Pilates Certification Center in Massachusetts. Martha holds national certifications for both group fitness and personal trainer through American Council on Exercise (ACE), is a TRX Qualified Instructor (Oct 2010) and is also a certified STAR LEVEL 2 SPINNING® instructor. Her cycling adventures include Trek Across Maine (1997 & 1998), Dempsey Challenge 50 miles (2009, 2010) and many of the Maine Bike Coalition sponsored rides. She has a love for learning and has taken several courses in anatomy and is continually staying updated of the latest research in the fitness industry. With a strong desire to help clients improve their fitness levels, she strives to make a healthy lifestyle enjoyable.

Mary Jo Ketterhagen

Mary Jo Ketterhagen-Ida

John Garey Fitness & Pilates
Los Angeles, California, USA

IT qualifications
Matwork, Reformer, Cadillac, Chair, Barrels, ISP, ZEN•GA®, Total Barre®

Additional credentials and designations
ACE, PMA, Gyrotonic Certified, Gyrokinesis Certified, Bachelors of Science / Microbiology

Bio

Mary Jo has had a long history in the fitness industry, beginning in 1993 as an Aerobics Instructor. She fist received her certification as a STOTT PILATES® Certified Instructor in 2002, and quickly moved on to become an Instructor Trainer for Merrithew specializing ZEN•GA® in 2013, Total Barre® in 2013 and is a Lead IT for STOTT PILATES. Since becoming certified, Mary Jo has taught courses throughout the Unites States, and internationally as well. In addition to her STOTT PILATES Certification, Mary Jo is also a certified White Lotus Yoga Instructor and a Mad Dogg® Spinning Instructor. She specializes in creating workouts for all fitness levels and helping each of her clients to reach their fitness goals.

See where I teach