“We thought it was notable that The New England Journal accepted this paper, that they would take fibromyalgia on as an issue, and also because tai chi is an alternative therapy that some people raise eyebrows about,” said Dr. Robert Shmerling, clinical chief of rheumatology at Beth Israel Deaconess Medical Center in Boston, co-author of an editorial about the study.

“Fibromyalgia is so common, and we have such a difficult time treating it effectively. It’s defined by what the patient tells you,” he added. “It’s hard for some patients’ families and their doctors to get their head around what it is and whether it’s real. So, that these results were so positive for something that’s very safe is an impressive accomplishment.”

Recent studies have suggested that tai chi, with its slow exercises, breathing and meditation, could benefit patients with other chronic conditions, including arthritis. But not all of these reports have been conclusive, and tai chi is hard to study because there are many styles and approaches.

The fibromyalgia study involved the yang style of tai chi, taught by a Boston tai chi master, Ramel Rones. Dr. Solomon and other experts cautioned that bigger studies with other masters and approaches were necessary.

Still, patients, who received twice-weekly tai chi classes and a DVD to practice with 20 minutes daily, showed weekly improvement on an established measurement, the Fibromyalgia Impact Questionnaire, improving more than the stretching-and-education group in physicians’ assessments, sleep, walking and mental health. One-third stopped using medication, compared with one-sixth in the stretching group.