The different stages of sleep are very important to the body as the production of certain hormones and other chemicals occurs during certain stages. One of these hormones is ADH (Anti-Diuretic Hormone), which enables the body to concentrate the urine. People who hyperventilate during sleep will often need to void urine more frequently than others and will experience broken sleep due to nocturnal visits to the bathroom. Children will often be bed-wetters.
The Buteyko Institute Method of breathing retraining normalises both daytime and night-time breathing. A return to normal sleep patterns is observed in the vast majority of people who undertake the Buteyko course.