Devices for relaxation utilize weak electrical impulses to relieve muscle tension and support regeneration. They most often operate on the TENS principle, short for Transcutaneous Electrical Nerve Stimulation. In this method, gentle electrical signals are sent through electrodes placed on the skin, stimulating nerve fibers. This stimulation can help alleviate feelings of stiffness and contribute to better muscle blood circulation. In response to the impulses, the body can also release endorphins, substances that naturally relieve pain and induce a sense of well-being. These electrostimulators are suitable for relaxing tired or strained muscles, for example, after physical exertion or prolonged sitting. The user can usually adjust the intensity and program type according to their own preferences.