People with arthritis who exercise have less pain, more energy, improved sleep, and better day-to-day function, according to the American College of Rheumatology. One form of arthritis, osteoarthritis, is the most common form of joint disease in humans and is a leading cause of disability among the elderly. Osteoarthritis is a slowly progressive joint disease typically seen in middle-age to elderly people. It occurs when the joint cartilage breaks down, causing the underlying bone to fail... 
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