For the record, arthritis is the leading cause of disability in folks over 55 years old. There are actually more than 100 different conditions that cause joint damage that are all forms of arthritis. The two most common are osteoarthritis OA (from bone wear and tear) and rheumatoid arthritis RA (an immune disorder).
In 2010-2012, 49.7% of adults 65 years or older reported doctor-diagnosed arthritis.
By 2030, an estimated 67 million Americans ages 18 years or older are projected to have doctor-diagnosed arthritis, according to the American College of Rheumatology.
I live with arthritis of the hands. Like love, arthritis is a many splendored thing: knees, hips, etc.
Harvard has had a lot to say on arthritis:
Alternative and complementary treatments for arthritis – Harvard
How to deal with arthritis of the hand – Harvard
8 Techniques to deal with arthritis – Harvard
4 Ways exercise helps with arthritis – Harvard
5 Weight-training tips for arthritis sufferers – Harvard