Academy of Orthopaedic Physical Therapy

American Physical Therapy Association (APTA)

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ISC Editorial Team


Dr Hughes has been an awarded faculty member in the school of Physical Therapy, Slippery Rock University since 1990. He received his Master of Physical Therapy degree from Slippery Rock University in 1992. He is a graduate of University of Virginia, PhD (Sports Medicine) 1990 and Springfield College, BS (Exercise Science, 1983), MS (Biomechanics, 1986). He has been a member of the National Strength and Conditioning Association (NSCA) since its inception in 1978. He obtained his CSCS in 1986. Dr Hughes received his advanced board certification in orthopaedics (OCS) in 2001. His research and graduate teaching have been in the area of skeletal biomechanics, orthopaedics, and therapeutic exercise. He has published in various peer reviewed publications.

Dr Hughes has worked part-time as an outpatient physical therapist since 1993 at North Hills Orthopaedic and Sports Physical Therapy in Sewickley, PA. He currently serves as editor of the independent study course (ISC) series produced by the Academy of Orthopaedic Physical Therapy of the American Physical Therapy Association (APTA). He is also editor of the Academy’s publication, Orthopaedic Physical Therapy Practice. His service to the profession includes leadership roles and presentations at regional and national levels. Dr Hughes is an active member of the APTA, NSCA, and the American College of Sports Medicine (ACSM). He frequently consults with industry in ergonomics and leads initiatives related to product research and development. His practice interests include spine, gait analysis, and joint replacement.


Dr Riddle is a visiting assistant professor at Chatham University in the School of Health Sciences, Doctor of Physical Therapy Program in Pittsburgh, PA. He graduated from Mercyhurst University, where he completed his Bachelor of Science degree in sports medicine. After graduation, Dr Riddle attended Chatham University where he completed his Doctorate in Physical Therapy. Dr Riddle is board certified in both orthopaedic and sports physical therapy by the American Board of Physical Therapy Specialties. He has also successfully completed certification as an athletic trainer and strength and conditioning specialist.

Dr Riddle is experienced in providing evidence-based care to patients with a variety of orthopaedic and sports-related conditions. His clinical interests include rehabilitation of the hip and lower quarter, orthopaedic conditions in the pediatric population, and optimizing biomechanical efficiency and function in rehabilitation. Dr Riddle serves his profession at both the local district and national levels. He is an advisory panel member and associate editor of independent study courses (ISCs) for the Academy of Orthopaedic Physical Therapy of the American Physical Therapy Association. He provides consultation to a local grocer and serves his community by screening athletes with limited access to health care who participate in local youth sports programs.

SHARON KLINSKI, Managing Editor

Ms Klinski has been part of the Academy of Orthopaedic Physical Therapy, APTA team since 1990, serving in many different capacities before settling into her current role as Managing Editor. Ms Klinski is responsible for managing the Independent Study Course series and Orthopaedic Physical Therapy Practice, the Academy of Orthopaedic Physical Therapy’s quarterly magazine, as well as an outside newsletter contract. Ms Klinski holds a Bachelor of Science degree in business administration from Winona State University, Winona, Minnesota.

Independent Study Courses

Testimonial From a Registrant...

“I wanted to thank ISC Editor Dr. Christopher Hughes, authors, and the entire team at the Orthopaedic Section for creating an amazing study course to prepare for the APTA OCS exam. I am convinced the Current Concepts of Orthopaedic Physical Therapy (4th ed) was one of the keys for me to successfully pass the OCS this June.”

- Z Altug, California

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