Diathermy, better known as Tecar therapy (an acronym for Capacitive and Resistive Energy Transfer), is a therapeutic technique that uses an electric current with frequencies in the MF (Medium Frequencies) radio band. It transfers energy in depth, through the tissues of the human body, triggering a biostimulating effect. This is a therapy that is carried out in a medical practice, usually by a physiotherapist, on patients with a variety of pathologies, requiring rehabilitation, sports and also aesthetic treatment..