One study tracked the progress of 84 sufferers, half of whom had the usual medication, while the rest went on a self-help programme of swimming, simple exercise, relaxation and simple dietary changes.

The self-help group said they were less fatigued, depressed or anxious, and had greater vitality, whereas the group under medical care reported no improvement in their condition.

(Source: Annals of Rheumatic Disease, 2004; 63: 290-6).