Aims : Access educational materials here To review the ongoing clinical studies and recent publications that describe the interaction between asthma and sleep-related breathing disorders; to give an overview of the epidemiology of asthma and sleep-disordered breathing in adults and children; to discussthe shared risk factors and inflammatory pathophysiology of sleep-disordered breathing and asthma, and the evidence that suggests that upper-airway obstruction influences asthma severity and response to therapy; to discuss the evidence showing that treating sleep disorders, including insufficient sleep and sleep-disordered breathing, improves asthma outcomes; and to describe novel methods to measure asthma and sleep-related breathing disorders in the home-setting.