Patients allocated to biofeedback received EMG-guided training during the 3 treatment sessions.4 Patients were trained to control the activity of the abdominothoracic muscles under visual control of EMG recordings displayed on a monitor. Specifically, they were instructed to reduce the activity of intercostal muscles and the diaphragm, while increasing the activity of the anterior abdominal muscles. After each biofeedback session, patients were instructed to perform the same exercises daily at home for 5 minutes before and after breakfast, lunch, and dinner. At the end of the treatment period, patients were encouraged to continue practicing these same exercises over time.