More than 24 million adults with arthritis are physically limited by the disease. That number represents a 20 percent increase from 2002 to 2014, according to new data from the U.S. Centers for Disease Control and Prevention. Some have trouble holding a cup and others find it hard to walk to their car. About 54 million adults have arthritis, or about one in four, and the CDC says they can do more to improve their symptoms. Dr. Lynn M. Ludmer, a rheumatologist at Mercy Medical Center, says that exercise can reduce pain and prevent progression of the disease.