Although pain sometimes limits physical activity, exercise is important to reduce the symptoms of JRA and maintain function and range of motion of the joints. Most children with JRA can take part fully in physical activities and sports when their symptoms are under control. During a disease flare-up, however, the doctor may advise limiting certain activities depending on the joints involved. Once the flare-up is over, a child can start regular activities again.
Swimming is particularly useful because it uses many joints and muscles without putting weight on the joints. A doctor or physical therapist can recommend exercises and activities.
Source: National Institute of Arthritis and Musculoskeletal and Skin Diseases.