Katy Boyd

Katy Boyd, Certified Teacher

Katy Boyd provides an embodied physical training experience with classes that emphasize body alignment, awareness of breath and kinesthetic sensation, and flow of movement. Her background training and performing as a figure skater initiated her study of movement forms that bring together core support, flexibility, strength and movement efficiency. She completed her teaching certification in Dance Conditioning and Pilates from Long Beach Dance Conditioning under the direction of Marie Jose Blum, and a second certification for teaching Pilates from Body Kinetics in Mill Valley under the direction of Carol Appel. Before moving to the Bay Area in 2004, Katy served on the Dance and Music faculties of Idyllwild Arts Academy and Interlochen Center for the Arts, where she worked closely and intensively with students training for professional careers in these art forms. Katy has been a guest lecturer and instructor of movement fundamentals and the applied principals of physical movement at Luther College in Iowa and Mercyhurst University in Pennsylvania. Her classes offer a space where participants may explore the means for stability, strength and freedom in movement.

Courtney Butowski

Courtney Butowski, Certified Teacher

Courtney is a multi-sport athlete (with a special love of soccer) who began Pilates to keep fit in her early 20s. She decided to become a Pilates Instructor after assisting (really insisting of) her husband in recovery from a torn Achilles tendon via an active Pilates routine. Thus, she decided to enroll in the Pilates Education Lab Teacher Training program at Internal Fire and learn from the absolute best in the business (Sharon Gallagher-Rivera). Courtney has now been teaching Pilates since 2016 and has found it rewarding beyond measure, especially when she gets to teach it to her two young sons, both of whom are soccer fanatics. Fitness has always been a positive part of her life and she continues to enjoy teaching others about body mechanics and how to be present in one's own body and inspire it to healing and wholeness.

Darien Gold

Darien Gold, Expert Teacher

When another dancer introduced Darien Gold to the Pilates method in 1992, she felt an immediate connection to the work and began studying with Romana Kryzanowska, a Joseph Pilates premier disciple. The Pilates technique seemed familiar to Darien because of her extensive background in high level gymnastics and her eighteen years as a professional dancer. Darien spent the next few years incorporating Pilates into her dance classes and in 1997, completed her pilates certification.

Darien was compelled to share what she was learning and began teaching in her Hollywood, CA apartment with a used reformer bought from a student. As her practice grew, she moved into a larger space and invested in the Cadillac, additional reformers, chairs and barrels. Three years later, another move — this time in West Hollywood above the famous TOI Thai restaurant on Sunset Blvd., and named this larger commercial space Studio Darien. After fourteen years she moved again — this time to a more tranquil environment — and now teaches in her home studio in Sonoma County. The peaceful countryside insures not only a great workout for the body, but elevates the mind and spirit as well.

Moving from hectic Los Angeles to her new forever home proved to be a very positive decision. Darien has shared her talents with a variety of facilities such as Yoga ONE, located in downtown Santa Rosa, POST Wellness by Design, a full-facility wellness center next to the Petaluma River, and Body Kinetics Marin Health Club where she taught classical mat and apparatus classes and served as a continuing Education Pilates instructor. At Lifestyle Pilates in Petaluma, Darien imparted the classical approach to a mostly contemporary clientele. This year, Darien worked with the Santa Rosa Police and Fire Departments, and now currently teaches private and group lessons at Internal Fire Pilates studio in Mill Valley, conducts mat and apparatus workshops at the Santa Rosa Airport Club, and has international Skype students from England, South Korea, France and Switzerland.

An invitation in 2018, took Darien across the pond to England where she taught classical Pilates to both classical and contemporary Pilates instructors. A decade ago, she had her first experience teaching outside the United States at the renowned fitness center, Rancho La Puerta in Tecate, Mexico.

On Sundays at 2pm on KPCA Petaluma, Darien’s radio show, "All Things Pilates" explores the on-going evolution of the Pilates method as well as its connection to other modalities such as Gyrotonic, yoga, podiatry and chiropractic. Listeners can expect additional information about the two main approaches to Pilates - Classical and Contemporary. In addition, Darien does voice-overs for the station’s PSA’s announcements.

Pilates Style Magazine named her Intermediate Mat DVD in 2010 and the Advanced Mat DVD in 2012, in the magazines “Top 10 Best DVDs” category. Darien was the first Second Generation classical Pilates instructor to present the traditional Intermediate Mat repertoire in an app, Studio Darien Pilates and two years later she produced her second app, Studio Darien Advanced Pilates. For those Pilates students who are just starting out, Darien’s basic mat DVD, The First Seven is available on Amazon. Her apps are also available in the App store and Google Play.

Jeni Jesse

Jeni Jesse, Senior Teacher

Jeni began studying the Pilates method in San Francisco as a client more than 10 years ago and quickly realized the benefits of this work, she became a bit of an addict. After two long and highly educational years of The Pilates Center of Boulder teacher training program she received her certification in May 2014. While working on this certification she also completed the Kathy Grant Heritage Training in Colorado. This training complemented the Pilates Center studies and has helped round out more of what this work can do for a body.

The Pilates method is useful in helping to transform the body, inside and out, aiding in strength, alignment, oxygenation, posture, and digestion just to name a few of the benefits. Having experienced this first hand with her own body as well as clients over the past couple of years while in the teacher training program.

“ It truly never ceases to amaze me how smart the body is and how with a little motivation the muscles and mind can transform into a strong or stronger body.”

Sharon Gallagher-Riviera

Sharon Gallagher-Rivera, Owner, Expert Teacher

Sharon Gallagher-Rivera is the Owner of Internal Fire Pilates and is also Co-Owner of Pilates Education Lab, a training program for aspiring Pilates teachers in San Francisco and Marin. Sharon is a seasoned instructor, and bodywork and rehabilitation specialist committed to enhancing the well-being and resilience of her clients across all physical states and abilities. and is also Co-Owner of Pilates Education Lab, a training program for aspiring Pilates teachers in San Francisco and Marin.

Sharon started as a young gymnast and a multi-sport athlete, earned her BA in Politics and Performing Arts from USF in 1992, and then spent decades performing, both commercially and with dance companies including Nuba Dance Theater, Printz Dance Project and others for many years. Initially trained by Ellie Herman, she began teaching Pilates in 1999 and taught at various studios in San Francisco and Marin, including Sanchez Street Studios, owned by Carol LeMaitre (now her teaching partner and co creator of Pilates Education Lab).

Today she is deeply proud of Internal Fire Pilates’ success and delighted with its growing community of loyal students. Her clients have always included other Pilates teachers, athletes and dancers, teens and elders, office workers and those living with physical challenges or chronic pain.

Sharon’s mastery of Classical Pilates and complementary approaches comes from working with many talented teachers over the years. Aside from years of study with Jennifter Stacey, M.S., she earned a Master’s Certificate with the renowned Pilates Center of Boulder, whose leaders learned directly from Pilates elder, Romana Kryzanowska, (taught directly by Joseph Pilates). Sharon enriches her Pilates practice with continued movement study through a regular Pilates practice, dance training in many styles including Modern/Contemporary, West African and Brazilian, Yoga and lessons with Jean Claude-West. Her students are her greatest teachers and she continues to gain experience through teaching with a range of methods. Aside from Pilates, these include: bodywork and massage techniques learned from her studies with Stephen Coleman, L.Ac., (blending the work of Lauren Berry, Swedish Massage, Rolfing and Feldenkrais), Jayne Edwards (Neuromuscular Rehabilitation work of Vladimir Janda, M.D.), and Sue Hitzman (creator of the M.E.L.T. method). A former Lululemon Ambassador, she also received the honor of being chosen as the 2012 'Next Pilates Anytime Instructor' and is a visiting instructor on their site pilatesanytime.com. She has modeled for Ellie Herman's books, 'Pilates for Dummies', 'Pilates Wunda Chair' and Ellie's Advanced Mat DVD.  She can also be found in Jordan Matter's 'Dancers Among Us' as well as Lois Greenfield's 'Moving Still'.


Jackson Grantham, Certified Teacher

I began training in Martial Arts in 2008, and completed my Brazilian Jiu Jitsu black belt certification through the world renowned Ralph Gracie by 2013. However, in 2010 my martial arts practice came to a halt after I suffered a neck injury that required surgery, which led me to the beginning of my Pilates journey. After three years of a dedicated Pilates practice, I was hooked, and decided to enroll in the Pilates Education Lab Teacher Training program. I've now been teaching Pilates since 2014 and the experience has been beyond rewarding. Fitness has always been a positive part of my life and I've enjoyed continuously learning more about the body through each movement system I've studied. The best part about teaching Pilates is that I love helping my clients learn how to embrace healthier changes in their bodies.

Jenna Jones

Jenna Jones, Certified Teacher

Jenna is a professional dancer who has taught ballet, contemporary, and jazz dance for over ten years. She discovered Pilates after experiencing several injuries which were due in part to muscular imbalances. With Pilates, she quickly rehabilitated her injuries and learned techniques to prevent them in the future. Jenna began teaching Pilates in 2015, and became fully certified in STOTT Pilates in 2016. She is excited to share her love for movement, health, and exercise with others through the Pilates method. Jenna is committed to working closely with clients to help them reach their individual fitness goals. She has experience with a range of clients, from professional dancers, to office workers with limited movement experience.

John Krause

John Krause, Certified Teacher

John Krause has been teaching Pilates since 2000, having first studied with Debra Schubert and Madeline Black in Sonoma. He has taught in studios in Southern California and San Francisco and had a private practice in Sonoma for nearly ten years. John has an affinity for helping people overcome chronic issues and injuries as well as improving posture and overall fitness. He also holds certifications in Thai Medical Massage, NeuroKinetic Therapy and the Gyrotonic Expansion System. He continues to find inspiration in the work of Joseph Pilates and is excited about being a part of Internal Fire Pilates! A former three sport athlete John has practiced martial arts and zen archery and is an accomplished musician. When he isn’t teaching Pilates you can find him sailing the bay or hiking the hills of Marin.

Mariette Lapiz

Mariette Lapiz, Apprentice

A passionate student of Pilates since 2012, Mariette decided to pursue teaching by joining the Pilates Education Lab Teacher Training in 2017. Mariette has always been a fitness enthusiast and enjoys many forms of exercise. She spent several years training in power and Olympic lifting and the Russian Kettlebell method. She now spends most of her time focusing on her Pilates practice. For her, Pilates awakens the connection of mind and body, keeps the body healthy, and aids in preventing and healing injury. Mariette has experienced the many benefits of Pilates and wants to share them with others.

Shana Morrison

Shana Morrison, Senior Teacher

After 30 years training in ballet and gymnastics, Shana Morrison began practicing Pilates in 2000 when a knee injury from dance led her to study new methods of strengthening and centering. Surprised and impressed with the results of her practice, Shana pursued teaching Pilates and became certified in the Pilates Method at the Ellie Herman Studios (author, Pilates for Dummies, Get on the Ball with Pilates, etc.) in 2004. Since then she has taught private apparatus sessions, duets, and classes in Marin County, San Francisco, and Silicon Valley. To expand upon her education in body movement and functionality. Shana has attended Gyrotonic, Gyrokenesis, and Franklin Method training workshops, and in 2011 completed certification as a personal trainer She enjoys sharing her knowledge of classical pilates method with students of all levels of ability, raw beginner to seasoned pro, and encourages Pilates skills in all mvement pursuits.

Sherri North

Sherri North, Certified Teacher

Sherri began studying Pilates in New York 10 years ago. She was introduced to the method from a friend as a form of toning and overall exercise. Quickly she saw the many benefits of Pilates and began her teacher training. Under the instruction of Brett Howard, Sherri was certified with the US Pilates Association in 2008.

Sherri has taught in New York, New Jersey, Connecticut & Australia. Some of her famous clients include: model, Lara Bingle and broadcast journalist, Barbara Walters. When she’s not teaching Pilates, Sherri enjoys hiking, skiing, and spending time with her two kids.

Ilana Murphy

Ilana Murphy, Certified Teacher

Ilana has enjoyed teaching and doing Pilates for the past 10 years. She first discovered this approach to informed movement via physical therapy following a car accident. She soon realized the many benefits it offers, including a fun weekly workout, balanced strength, and support for participating in life’s other activities with grace and resilience. She was certified by Pilates Education Lab and Ellie Herman Studios (EHS) and does ongoing continuing education, most recently with The Pilates Workshop, S.F. (a satellite studio of The Pilates Center, Boulder).

In addition to teaching Pilates, Ilana is a licensed acupuncturist and herbalist. She is certified to teach Balanced Body's Anatomy in 3-D curriculum. She has spent the last couple of years working as a freelance health writer while traveling the world.

Lisa Prewitt

Lise Prewitt, Senior Teacher

Lise Prewitt began taking movement lessons as soon as she could walk. She was introduced to movement imagery and anatomy as a child through Idiokinesis.. This was the beginning of a strong background in understanding the body and for creating a great body awareness. She majored in biology and chemistry while continuing to study and perform modern dance.She began integrating movement and the biological understanding of the body with the study of Ideokinesis, Laban/Bartenieff and Body-Mind Centering. She was introduced to Pilates in 1994 while performing with a dance company, and then in 1996, after injuries from a car accident limited her abilities to dance and perform, she began to learn to teach Pilates. She has taught for both Ellie Herman's and Balanced Body's Pilates teachertraining programs and works with teachers as a mentor.With over a decade of Pilates teaching she also incorporates the nueromuscular techniques of Vladamir Janda, yoga, Feldenkrais, Franklin Method and her love of athletics and movement. She is currently in the Masters Program at The Pilates Center in Boulder, CO, and is a certified MELT Hand and Foot teacher. Her teaching is informed through technical understanding of anatomy and biomechanics, her intuitive sense of the body and her keen observation of posture and movement. She enjoys working with people of all fitness levels as well as with people who have nuerological conditions and those recovering from injuries and trauma.

Jayne Reichert

Jayne Reichert, Trainee

Jayne has spent the last 25 years either behind the stove in a professional kitchen, at the farmer’s market shopping, catering someone’s life celebration or standing in front of a roomful of people, teaching them how to cook. It’s been an amazing journey! Last year as a birthday present to herself, she took the year off and headed south of the boarder to surf, cook, eat and hit the “reset” button. That time was very reflective and filled with thoughts about what to do next. Whatever it was, she needed to be as passionate about it as she was about cooking and teaching. Working out and being physically fit has always been very important to her and the idea of being a personal trainer crossed her mind once or twice, but there was something missing in that. It didn’t feel as engaging to her.

Her first Pilates class was at least 22 years ago at the Club One in the Fillmore. She still remembers how absolutely electrifying it was, literally from the top of her head all the way down through the tips of her toes. It was intoxicating, but at the time not very realistic for a culinary student. Fast forward 20 years, a career spent on her feet and a minor surfing accident (the board went one way and her knee went another) and well guess where she ended up, yep in Pilates. She originally turned to Pilates as a way to rehabilitate her knee without surgery or loss of time at work and it was very effective. So, as she sat on that beach in Mexico and toyed with ideas about what to do next, the idea of Pilates and training to become an instructor kept returning to her. The idea of not just movement but the whole mind body breath connection and the concept of returning to movement or rather finding freedom in movement by connecting all the parts. It is definitely a humbling experience, as your weaknesses are identified very quickly and there’s nowhere to hide. It’s challenging. That challenge energizes and inspires her and that is what she’d like to share and pass on to others as she continues on this journey to fine tune her own practice.

Fernanda Repsold

Fernanda Repsold, Senior Teacher

Fernanda Repsold was first introduced to Pilates in 2002 as a suggested form of rehabilitation for a foot injury she incurred while training for triathlons.  In the process, she found that Pilates not only helped towards her successful recovery, but also helped unleash her passion for simple and complex patterns of movement throughout the whole body. As an athlete at heart, and an avid practitioner of yoga and gyrotonics, Fernanda believes Pilates is the binding ingredient that keeps the body strong, balanced, and free of injury.  Fernanda enjoys working with people from all walks of life, and is especially interested in applying Pilates as a means of stimulating the body's natural ability to heal.  Her style of teaching fosters a collaborative process of discovery, combining form and function, while always looking to the whole body to create a supple and uniformly developed structure.  

- B.A. University of California Berkeley.
- Advanced Teacher Training and Masters Program - The Pilates Center, Boulder CO.
- PMA Certified - Pilates Method Alliance.
- 200 Hour Yoga Teacher Training Graduate - YogaWorks.

Destinie Slavich

Destinie Slavich, Certified Teacher

Destinie was born and raised in San Francisco. A rowing scholarship moved her down south to compete for UCLA’s Division-I team. Though she loved the sport, 4 consecutive years of meeting its demands left her with debilitating low back and hip injuries. After graduating, she sought to regain functional health and shed chronic pain, so she started working with a physical therapist and was thereby introduced to the restorative method of Pilates. Pilates quickly turned into one of her passions and she went on to complete The Pilates Center's 950-hour Advanced Teacher Training Program under the revered teacher-trainers Erika Groff and Susanne Staehr. Destinie believes that through movement, students can work their way to a more pain-free life full of strength and mindfulness. She looks forward to sharing the work and hopes it will touch others in the same powerful way it touched her.