Abstract: A pursed lip breathing device includes a housing defining an air channel through which a user breathes. A mouthpiece is attached to the housing and includes an aperture generally aligned with the air channel so that when the user breathes through the aperture, an airflow is generated in the air channel. The mouthpiece has outer dimensions designed so that the user's lips are pursed during breathing. During breathing, the airflow in the air channel is restricted to include pressure on the user's pulmonary system. Information or feedback regarding the user's breathing may also be provided so that the user is motivated and encouraged during breathing exercises and may monitor the therapeutic effect of his or her breathing.