Osteoarthritis (OA) most often affects the hip and knee joints. The first signs and symptoms of pain, stiffness or swelling are not uncommon in those in their thirties and forties and 10 per cent report symptomatic knee OA by age 60 years. Education and exercise are essential for people with OA to help them manage their condition better. Exercise can reduce pain, improve mobility and enhance quality of life. However, doing the right exercises in the right way is important so that joints are not overly stressed.