My research program focuses on developing biomechanically-sound physical activity guidelines for adults with the most common forms of arthritis that are associated with aging. Promoting physical activity is paramount to the well-being of Canadian adults as they age - exercise provides as much pain relief for arthritic pain as drugs, while also reducing the risk for co-morbidities including cardiovascular disease and cancer. However, excessive physical activity, due to work or recreation, can promote joint damage. Canadians with arthritis have no guidance on the amount, type or intensity of physical activity that damages joints. I use biomechanical methods to evaluate the impact of physical activity on joint health, with an aim to develop guidelines for physical activity that promote health and productivity, while minimizing the risk for arthritis progression.