Researchers have said that all one needs is an hour’s gentle exercise to help cut your risk of becoming disabled by osteoarthritis by nearly a third. Professor Dorothy Dunlop of Northwestern University Chicago who studied nearly 2000 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 1680 people aged 49 to 83 who were free of disability but either had or were at risk of developing osteoarthritis in their knees. Patients wore an