Our Focus Is On You Whether you need Physical Therapy, Sports Therapy, Rehabilitation, Orthotics, 3DMAPS or ASTYM.
The Functional Performance Center is located in Tempe, AZ, and has been treating patients here since December, 2001. Our staff is dedicated to providing the best treatment and customer service possible. Thanks to our wonderfully dedicated patients, we appreciate the continued opportunity to provide top quality functional physical therapy.
Our evaluations and treatment strategies are centered around “function” and movement.
We work hard at earning your trust by providing you with the most scientifically-based strategy to help you improve and maintain your physical and functional well-being.
Meet Our Physical Therapists
Derek Steveson, PT, DPT, FAFS, ASTYM Cert.
In December, 2001, Dr. Derek Steveson founded the Functional Performance Center as a way to fill the need to provide high level professional health services to our community. He earned his Doctor of Physical Therapy degree from Creighton University in 1996. He served as the Official Rehabilitation Consultant to the Arizona Diamondbacks from 2001-2007, has had the distinct privilege of being the colleague of Dr. Gary Gray, PT, and closely associated with the Gray Institute since 1997.
Dr. Derek has mentored nearly 100 doctoral students and lectured all over the world on the principles, strategies, and techniques of Applied Functional Science and Functional Biomechanics from the Gray Institute. He has prescribed over 5,000 custom-molded biomechanical foot orthotics as well. Dr. Derek is an ASTYM-certified provider and trained in 3D Maps Movement Analysis Screening.
In 2007, Derek invented what was known as the Core Stick and now known as the Core Momentum Trainer (CMTtm), which is a unique device that allows for the muscles of the core to be activated and strengthened in all planes of motion. (See our Resources page to order your CMTtm from Escape Fitness.)
Derek is involved with philanthropy and fundraising for local and international non-profit organizations, and enjoy working out and playing with his nephew, Eli.
- Former Faculty Member, Gray Institute of Functional Transformation
- Guest Lecturer on functional biomechanics
- Former Member, Board of Directors, Connecting to Serve
- Sponsored numerous fundraisers for non-profits locally and overseas – Mission Africa / Not For Sale Campaign
Sara Ullenbruch, PT, DPT, ASTYM Cert.
Dr. Sara Ullenbruch joined Functional Performance Center in January, 2014. She graduated from Wayne State University in Detroit, Michigan, with a Doctor of Physical Therapy degree in 2013. She also earned a Bachelor of Science degree in biology from Siena Heights University in 2010 where she played volleyball, pole vaulted, and threw javelin. Sara is a Certified ASTYM Provider, has completed courses from The Gray Institute, Postural Restoration Institute and continues to learn more about Applied Functional Science daily. She enjoys working with athletes, pre- and post-surgical patients and various orthopedic conditions.
Sara is originally from Michigan but moved to Arizona originally for an internship at Functional Performance Center. Her hobbies include hiking, mountain biking and Krav Maga where she is also an instructor at East Valley Krav Maga.
Brooke Iseler, PT, DPT
Dr. Brooke Iseler joined Functional Performance Center in February, 2017. She graduated from Wayne State University in Detroit, Michigan, with a Doctor of Physical Therapy degree in 2016. She also earned a Bachelor of Science degree in Psychology from Central Michigan University in 2012. She enjoys working with athletes of all ages with various orthopedic conditions.
Brooke is originally from Michigan, who came to Arizona to complete an internship at Functional Performance Center, and recently made the permanent move to the area. Her hobbies include playing softball, horseback riding, and watching sports of any kind. She is excited to get to know the people and activities in the area.