The risk of becoming disabled by osteoarthritis is cut to nearly a third with the help of an hour's gentle exercise as said by researchers.
Professor Dorothy Dunlop, of Northwestern University, Chicago, who studied nearly 2,000 patients with arthritis in their knees, said: "It is known that the more time people spend in moderate or vigorous activities, the less likely they are to develop disability, Daily Express reported.
The researchers looked at 1,680 people aged 49 to 83, who were free of disability but either had, or were at risk of developing, osteoarthritis in their knees.
However, the team also found that people who did light physical activity also had fewer disabilities.
The research has been published in the British Medical Journal.