Professor Konstantin Buteyko is a Russian doctor who discovered, while working at the First Medical Institute in Moscow, that how people breathe affects their health. His experiments showed that when patients overbreathe, they develop unpleasant symptoms, but that these disappear when they are taught how to breathe correctly. At first there was considerable scepticism, but when he demonstrated the quick recovery of 200 very sick people his colleagues were won over. Since then many thousands of Russian patients have been successfully treated and around 92% no longer need medication.