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Whilst most patients are satisfied with their outcomes after a total knee replacement, moderate to severe persistent knee pain, defined as pain persisting beyond 3 post-operative months following surgery, can affect 25% of people at 6-months. NJ’s PhD studies have found associations of persistent high pain with reduced function, and reduced health related quality of life. Other studies have found that pain persisting after a knee replacement can interfere with walking, general activity and mood and reduced quality of life. A literature review conducted as part of NJ’s PhD (unpublished) found no rehabilitation programs addressing persistent pain after knee replacement. NJ, during his PhD studies, has designed a web-based, self-paced, pain rehabilitation program called Kneed to treat pain, reduced function and reduced quality of life for those with persistent pain after total knee replacement for osteoarthritis. The program consists of pain neuroscience education, exercise, motor imagery, desensitization techniques, relaxation, sleep and cognitive strategies such as goal setting. Educational and other strategies aim to normalize movement patterns (by reducing protective movements) and engage participants in functional activities by empowering behavior change. Kneed is being evaluated for the first time in a research study but has been used by patients under clinical supervision from Dr NJ (a Rehabilitation Physician) in a clinical practice. The potential benefit of Kneed as a digital health solution is to provide low-cost treatment to a broad audience, not limited by location (for example, rural areas and cities without pain management services). There are currently no evidence-based treatments available for this persistent pain condition, Kneed aims to provide one.