Thursday, December 12, 2013 PT Keysor Elected Chair of Key Osteoarthritis Group APTA member Julie Keysor, PT, PhD, has been elected to lead the Physical Activity Work Group of the Osteoarthritis Action Alliance (OAAA). APTA is a member of the alliance. Keysor is the director of the Center for Enhancing Activity and Participation Among Persons With Arthritis at Boston University. She is a member of APTA's Geriatrics, Orthopaedics, and Research sections. The Osteoarthritis Action Alliance is a national coalition of concerned organizations mobilized by the Arthritis Foundation and the Centers for Disease Control and Prevention.