Heat massage is a function of some electrostimulators that combines electrical stimulation with warming. The device, through electrodes, not only sends electrical impulses but also simultaneously heats the treated area. This heat helps to relieve muscle tension and improve tissue blood circulation, which can enhance the effectiveness of the stimulation itself. This process, where heat is used for treatment, is professionally called thermotherapy. The combination of heat with electrical impulses can thus contribute to more effective muscle relaxation and regeneration.