Tai chi is more effective at relieving the pain and other symptoms of fibromyalgia than conventional stretching exercises, according to a randomised controlled trial carried out by American investigators. Sixty-six patients were randomly assigned to twice-weekly 60-minute sessions of either Yang-style tai chi or a control intervention consisting of wellness education and stretching, over a 12 week period. All 33 patients in the tai chi group reported improvements in fibromyalgia symptom scores and quality of life. These improvements were significantly greater than those seen in the stretching group and were maintained at 12-week follow-up. (A randomized trial of tai chi for fibromyalgia. N Engl J Med. 2010 Aug 19;363(8):743-54).