Biofeedback is the process of gaining greater awareness of many physiological functions of one's own body, primarily using electronic or other instruments, with a goal of being able to manipulate the body's systems at will. This mind-body technique features the use of visual or auditory feedback to gain control over involuntary bodily functions. The process involves being connected to a device with sensors that provide feedback about specific aspects of your body. The goal of biofeedback is often to make subtle changes to the body that result in a desired effect. This might include relaxing certain muscles slowing heart rate or respiration, or reducing feelings of pain. By doing this, people are often able to improve their physical, emotional, and mental health. The purpose of our study is to reveal instantaneously to patients and therapists certain physiologic events and to teach the patients to control these otherwise involuntary events by manipulating the displayed signals. Results show that biofeedback is applicable to physical rehabilitation through the determination of an optimal recovery method based on a patient’s comfort and muscle activity while performing rehabilitation exercises.