I agree that yoga can help to prevent postural problems and help with relaxation; however, it's important to understand that his complementary exercise can always help and in some circunstances can cause more problem than help. It's important to understand that we need to knowledege if the OA person does not have asociated condition due to ageing such osteopororis or even dementia. The difficulty is if these conditions are also presents will ask us to ensure that the personal programme given will promove general assistance to the OA needs. In my opnion, a accurate assessment of the environment and the person's physical capacity and needs will help you to provide a balanced postural and exercise programme. Good idea is to have a photoguideline programme in place and review it as necessary.