There is increasing interest in the use of complimentary therapies. At present, there is a paucity of data examining the effectiveness of such therapies in patients with diabetes. We have examined the influence of providing yoga for patients with diabetes that is poorly controlled despite the best efforts of the multidisciplinary team. After obtaining ethical approval, 37 patients with poorly controlled diabetes were randomised to a traditional intensive education programme and simple exercises or a 16 week (32 session) Hatha yoga plan. Participation in regular yoga sessions did not improve glycaemic control but insulin requirements remained stable in the yoga group and increased in the controls. Although quality of life was not altered, all but one subject in the yoga group opted to continue with yoga long term after completion of the study.