 Hi, I'm Dr. Sunil Kini working as a concerted orthopedic surgeon at Manipal Hospital's Bangalore. To start with age is one of the non-modifiable causes of arthritis. Earlier it was thought that arthritis mainly affects people over the age of 60 or 65 years, but it's not true because of changing lifestyle habits and obesity. We see that arthritis in a much younger population now say in the late 40s or the early 50s. The arthritis is mainly caused in this age group by the wear and tear of the cartilage and after which there's an appearance of bone to bone. So for the elderly population it's very important to keep fit and modify their lifestyle accordingly, do exercises so that they can keep the joints in place for a longer time.