SuPRA: Using Wearable Activity Trackers With a New Application to Improve Physical Activity in Knee Osteoarthritis

Inclusion Criteria: * Have a physician confirmed diagnosis of knee osteoarthritis OR are both 1) over 50, and 2) have experienced 4 weeks of pain, aching, or discomfort in or around the knee during the last year (equal to or more than 28 separate or consecutive days). * Have no previous diagnosis of inflammatory arthritis (e.g., rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis), connective tissue diseases, or gout. * Have no history of using disease-modifying anti-rheumatic drugs, such as hydroxychloroquine, sulfasalazine, methotrexate, biologic agents (e.g., Humira, Enbrel), or gout medications. * Have no prior knee arthroplasty, and not on a waiting list for total knee replacement surgery. * Have no history of acute injury to the knee in the past 6 months. * Have not had surgery in the back, hip, knee, or ankle joints in the past 12 months. * Have an email address and use online/mobile applications. * Are able to attend one 1.5-hour education session. Exclusion Criteria: * Have received a hyaluronate injection in a knee in the last 6 months. * Have received a steroid injection in a knee in the last 6 months. * Are at risk when exercising, as identified by the Physical Activity Readiness Questionnaire.