Bodybuilders have an expression, "No pain, no gain," meaning if you don't feel sore after a workout, the results may be unimpressive. For arthritis sufferers, however, the pain from their condition may discourage them from exercising at all.

This really is a no-gain situation because studies have shown that exercise can help people with osteoarthritis improve their range of motion, strengthen their muscles and get a better night's sleep. And it can actually reduce pain.

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Exercises aimed at increasing flexibility are especially beneficial. These include nonimpact, gentle routines such as yoga, tai chi and stretching. The National Institute on Aging has a downloadable tip sheet with several flexibility exercises at nwsdy.li/flexibility.

As always, don't begin any new exercise routine without first checking with your physician.