People with arthritis are all to familier with pain's immobilizing effects. Yet an 18-month study suggest movement may be the medicine they require.

People with osteoarthritis of the knee who walked or lifted weights three times weekly were half as likely to suffer disabling pain compared to a group who were inactive. Many of the sedentary patients required assistance in dressing or bathing by the end of the study. The American university scientists who authored the study believe exercise helped by giving people strength, flexibility and confidence.

Finding the right programme is simple, say experts. Choose a sport that's easy on the joints, such as walking, swimming or cycling. Start slowly, and be ready to change your workout if your experience discomfort.