Pilates Defined has some of the most qualified, professional instructors who are all certified and experienced in the Joseph Pilates method. Each has a unique style, and all are dedicated to creating a customized workout program that is tailored to your needs.

Jessica Fritz Peters
Owner and Director

Since she began her career instructing Pilates in 2001, Jessica has made her clients her priority and she will ensure you achieve the goals you’ve set for yourself. She has been stretching and moving her own body ever since she can remember. By age 14, she was part of a professional modern dance company in her hometown of State College, PA. After completing a BFA in dance performance at The Ohio State University, Jessica lived in San Francisco, where she danced professionally with the Moving Arts Dance Collective as well as various other dance companies. Jessica also traveled from pre-schools to high schools, teaching gymnastics and creative movement classes. The rigorous demands of professional dancing helped Jessica to recognize the amazing benefits of Pilates.

With years of experience teaching modern dance, ballet, gymnastics, and yoga, the transition to becoming a full time Pilates trainer was seamless. In 2001, she completed her Pilates Certification through the Integrated Teacher Training Program with renowned Master Instructor, Madeline Black. After teaching Pilates for one year, Jessica realized that because of muscle tension, many her clients were struggling to access some of the smaller postural that Pilates utilizes. In an effort to further help her clients, Jessica was certified in a form of self massage called Yamuna Body Rolling™. She credits Body Rolling™ and Pilates with keeping her body flexible and strong enough to complete three full marathons.

Jessica continues to study and learn from the leading names in the industry in order to further develop her base of knowledge. She specializes in seeing the nuances and appreciating the subtleties of the work, and through detailed verbal and hands-on cues, ensures that her clients are getting the full benefits of Pilates. In 2014, she successfully completed a second certification to become a Certified Pilates Method Alliance Teacher (PMA-CPT).

“I am grateful for the opportunity to share the experience of Pilates with others. The best part of my job is knowing that my clients feel better in their bodies and walk out of the studio with a renewed sense of strength, confidence and overall well-being.”

“I always make it a point to ask each and every client ‘How is your body?'”Jessica Fritz-Peters


Kathryn Murphy

Kathryn is a Pilates Instructor, Reiki Master and lover of dance. She has a B.A. in Art History from the College of Charleston where she minored in dance. Kathryn’s seventeen years of dance experience include performance, choreography and teaching. As a Reiki Master and dancer, Kathryn loves the connection between movement and physical rehabilitation offered by Pilates.

After two years of taking private Pilates instruction, Kathryn decided to make a career change and has completed the Pilates Defined teacher training program and is certifying with the Pilates Method Alliance. Over the past two years, Kathryn has dealt with GI issues stemming from many food allergies and sensitivities. As a result, she has become an avid believer in the power of nutrition and clean eating, as well as maintaining a holistic lifestyle.


Tricia Rongstad

Joseph Pilates called his work “complete coordination of body, mind and spirit.” Tricia calls it her happy place! The fluidity and grace of the movement first drew Tricia to pilates and it makes her feel like the dancer she always wanted to be. Pilates has increased her strength and joint stability beyond what she had accomplished with other forms of exercise, and she enjoys the sense of having longer, leaner muscles. Pilates also helped ease chronic neck and shoulder pain that had plagued her since her first desk job out of college. After seven years of spending as much time as she could as a student in the pilates studio, she decided to pursue instructor training to better understand the method and deepen her own practice. In completing the Pilates Defined teacher training program, she realized she appreciates the gift of helping others discover what pilates offers them. From an athlete training to improve performance to a senior working to maintain muscle and mobility, pilates provides the tools for every body to function at its optimum.