Exercise might seem like the worst thing for stiff, aching joints. But it may be just what people with arthritis need. Completing an eight-week program specially designed for people with arthritis improved range of motion and reduced pain and fatigue, according to a study of 346 patients conducted by the Thurston Arthritis Research Center at UNC-Chapel Hill.

BONUS: While pool-based exercise is frequently recommended for people with arthritis, the UNC-CH study looked at routines that could be done while sitting or standing. Some classes included floor work.

WHO WAS STUDIED?

The study, published last month, included people with self-reported arthritis severe enough to limit their normal activities. The average participant's age was 70. "We were specifically evaluating the people with the least amount of activity coming in," said Leigh F. Callahan, the UNC-CH associate professor of medicine who led the study. Arthritis is the leading cause of disability in this country, affecting about 46 million Americans.

WHAT EXERCISES WORKED?

Participants did movements such as lifting their arms overhead or getting up and down from a chair. Workouts also incorporated stretching with resistance bands and light weightlifting. The routine is known as the Arthritis Foundation Exercise Program. Many movements can be done at home and require no equipment.

HOW LONG DID RESULTS LAST?

Participants experienced meaningful improvements in pain and fatigue for at least six months after completing the class. Though not tracked beyond that, patients reported they felt less confident in their ability to safely exercise as time passed, indicating that people may need to remain in a class to show continued benefit, Callahan said.

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