Biofeedback is a training technique that conveys information about a patients’ bodily functions that are typically considered outside conscious control. For instance, EMG biofeedback provides information about muscular activity. When treating insomnia, biofeedback is often used in conjunction with relaxation training or other behavioral approaches. The goal is to help raise patients’ awareness of their physiological processes, so that they might gain control over them. For instance, biofeedback may help people recognize both when they are having an exaggerated physical stress response, and well as to what they are responding. Eventually, this is thought to help people learn to control and minimize their stress response, thus leading to healthier sleep.