About Us

Colorado Spine Therapy, LLC is a physical therapist owned private practice and provider of non-surgical spinal physical therapy aiming to address all preventative, interventional and management components related to spinal rehabilitation (i.e., the physical, psychological, spiritual, nutritional and ergonomical components).

An evidence-based approach to spinal care will be the standard in which outcomes are determined using only measures described in peer reviewed spinal journals.

Stefan JH van Duursen, PT, MSc, MTC, Cert.MDT, FAAOMPT

Mr. van Duursen graduated in 1991 with a BSc in physiotherapy from the School for Higher Education in the Netherlands.

In 1996 he completed a certification in manual therapy at the University of St. Augustine in St. Augustine, Florida.

Following this certification he completed a one year fellowship in orthopedic manual physical therapy in 1998 and went on to receive his MSc in orthopedic physical therapy in 2000, again through University of St. Augustine in Florida.

In 2005 Mr. van Duursen completed a certification in mechanical and diagnostic therapy (“the McKenzie method”) through the International McKenzie Institute in New York, New York.

Mr. van Duursen is a member of the Royal Dutch Society of Physiotherapists, the American Physical Therapy Association (including its orthopedic section), the International McKenzie Institute, The North American Spine Society and a fellow of the American Academy of Orthopedic Manual Physical Therapists.

Mr. van Duursen is the owner and founder of Colorado Spine Therapy, LLC.

Renée Ostertag, DPT

Renée is the newest member of our staff, joining us in April 2009. She brings with her 6 years of clinical experience after graduating with a clinical doctorate in Physical Therapy from University of the Pacific in Stockton, CA. Three years after graduation, she took a yearlong course on Musculoskeletal Physiotherapy which allowed her to sit for certification as a COMT (Certified Orthopedic Manual Therapist). Following that, she studied at the University of South Australia and gained a second Masters Degree in Sports and Musculoskeletal Physiotherapy.

She has clinical experience in a variety of settings including acute care at Stanford Hospital and sports physiotherapy in Adelaide, Australia. Through working in a variety of settings, Renée has a global perspective of the patient care continuum. She has a strong background in manual therapy, enjoys working with the intricacies and complexities of chronic pain, and has expertise in both extremity and spinal dysfunction through working in several clinical practices around the world.

As a recent transplant from California, Renée can be found running outside in preparation for her next marathon, skiing, hiking, or doing anything else outdoors that beautiful Colorado has to offer.

Sarah Murane, Administrative Assistant

Sarah has ten years of experience as an administrator, starting with a position she held right out of high school. Following high school she held several administrative positions while attending college in Mississippi. After deciding to return to her home state of Colorado, she began her career in the world of physical therapy and worked as the Administrative Assistant for a clinic of which Stefan van Duursen was the Director. Having really enjoyed working with him in that setting, she was happy to join him as the Administrative Assistant for Colorado Spine Therapy, LLC. Sarah is married with two daughters. After the birth of her first child, she decided to take a break from the workforce to stay home and raise her children. While at home Sarah studied to be certified as a Labor Doula and Postpartum Doula. She then went on to receive training in lactation and childbirth education. Shortly after receiving her certifications she started her own business in 2003 and continues this passion part-time as a Doula, Lactation Educator and Childbirth Educator. Sarah enjoys meeting new people and is committed to providing the type of service that meets the needs of those she works with. Please feel free to contact her with any questions you might have in regards to your insurance or appointments, or if there is anything else that can be done to make your experience at Colorado Spine Therapy, LLC a positive one.