If you look at how people are getting older and older and how diseases are slowly but surely being banned (I mean that less and less diseases are lethal), it's easy to understand that rheumatism is becoming more and more of a visible problem. Bodies wear and if you get older, don't really pay much attention to minimising that wear, then it's for sure very well possible that one day you'll have to pay the price. So it's important to find out how to prevent that. It's not only physical exercises that can help, there are also many nutrition additives that prevent the wear of your joints, for instance.