Obesity is the main risk factor for developing osteoarthritis of the knee.
Knee osteoarthritis is the most common cause of major disability, affecting over half a million people in the UK.
Between a quarter and a half of all knee osteoarthritis might be prevented by eliminating obesity.
It is also well documented that exercise can reduce the pain of knee osteoarthritis.
Even if you are happy with your weight, and whether you have osteoarthritis or not, taking regular exercise will improve your health.
For more information on osteoarthritis, visit the Arthritis Research Campaign website.