The APTA has distinct and separate definitions of fellowship and residency programs. Please refer to the link below: http://www.abptrfe.org/FellowshipPrograms/AboutClinicalFellowshipPrograms/
A clinical fellowship program in physical therapy is a post-professional planned learning experience in a focused advanced area of clinical practice. Similar to the medical model, a clinical fellowship is a structured educational experience (both didactic and clinical) for physical therapists, which combines opportunities for ongoing clinical mentoring with a theoretical basis for advanced practice and scientific inquiry in a defined area of sub-specialization beyond that of a defined specialty area of clinical practice, i.e. beyond orthopedic PT.
A fellowship candidate has either completed a residency program in a related specialty area, is a board-certified specialist in the related area of specialty (OCS), or has demonstrable clinical skills within a particular specialty area. Fellowship training is not appropriate for new physical therapy graduates. (ABPTRFE 2013) Orthopaedic manual physical therapy (OMPT) is a sub-specialty of orthopedics, and therefore an OMPT fellowship must follow a demonstrated period of post-professional clinical experience in orthopedic physical therapy.