About Spiral Expansion
I am a Gyrotonic and Gyrokinesis Instructor, certified by the Gyrotonic founder, Juliu Horvath. I've been a dancer since age 3, a mother, business owner, sports enthusiast and a passionate healer, helping clients for many years. I'm also certified in Pilates, 
Massage Therapy, Neuromuscular Integrative Action (NIA), Integrated Awareness®, Visceral Manipulation and CranioSacral Therapy . I have practiced yoga and Pilates for over 20 years.
Of the many healing modalities I have experienced, the Gyrotonic Expansion System provides the most genuine experience of relaxation while moving, play while working out and the pleasure of being in a body. Whether you are recovering from injury or improving existing skills, I create a safe place for new learning to occur so you can reach your goals.
What Clients Say
“For the first time in many years I am actually anticipating with eagerness a work-out session with Siena and her Gyrotonic equipment. For me, this is truly providing the quality of life I desire.”
Mary Ellen Rayner, Business Owner
"I was in a severe car accident about 3 years ago, that took a great toll on my body. Before I met Siena, I thought my body was doomed to pain for the rest of my life. I have been doing Pilates and Gyrokinesis with Siena for about 3 months. She is definitely a godsend! There aren’t enough words to say how much this woman has done for my recovery. She is retraining my posture, walk, mobility and strength. It has been and continues to be a pleasure to know her. And there is no way to repay her for the gift of life she has given to me! Thank you so much Siena!
Lacey Gardner, Student
"Gyrokinesis and teacher Siena McCarthy have greatly improved my health and quality of life. Before I discovered them, my back muscles were very tight, my range of motion severely limited and I had constant pain. Under
Jerry Bova, Teacher
“I’ve been a movement instructor for many years and Siena’s way of teaching Gyrotonic movement has gotten me to slow down and enjoy moving again in a way I never thought possible.”
Ava Motter, Pilates Teacher
“Being almost 70, I was concerned about maintaining my balance and freedom of movement as I age. Siena has shown me how spiral movements re-establish mobility, restore equilibrium and keep me feeling young at heart.”
Vita Lawson, Office Manager
“I used to work out with free weights and gym equipment. Using Gyrotonic has shown me that you can actually accomplish more by doing less.”
Mark Bender, Ph.D. Psychologist
“Siena McCarthy brought me back to life as far as I’m concerned!! For many years I had severe bilateral tendonitis, as well as upper back and neck strain. Unfortunately, every time I made an attempt to work out, my elbow, neck and back pain would return. So, I decided to give Siena a call and ask her advice, and that’s when she told me about Gyrotonic exercise. I couldn’t believe how fast I recovered my strength and flexibility! With Siena’s incredible guidance and extensive knowledge on how to use this unique equipment, I was able to work out again. Gyrotonic exercise is truly amazing and it also enhanced my balance and mobility in all of my joints. I was finally able to work my arms and upper body freely without pain. In addition, Siena also helped me to become more aware of my breathing and posture while working out. I highly recommend Siena and Gyrotonic movement to anyone who wants to regain flexibility, balance and muscle strength. Whether recovering from an injury or just wanting to get into great shape, Gyrotonic exercise works!”
Leigh Pyron, Nutrition and Fitness Counselor