Heon Seock Cynn is a professor in the Department of Physical Therapy at the College of Health Science of Yonsei University. He received BS degree in Physical Therapy from Yonsei University, MA degree in Physical Therapy from New York University, and PhD degree in Physical Therapy from Yonsei University. He was a full time lecturer of Seoul Health College and an associated professor of Hanse University. He is a director of applied kinesiology and ergonomic technology laboratory, and his research interests are identification of etiologic factors, classification, and intervention approaches for movement disorders and musculoskeletal diseases.