EMS training device (10), with an EMS stimulation generation unit (3), which forms a plurality of EMS stimuli distributed over time from a current taken from a current source and following a scheme of predetermined stimulation, and electrodes that consist of pulses of current and / or alternating current with predetermined values such as amplitude and frequency, in particular EMS electrodes (1) associated in pairs with each other, which can be placed in a living body for impulsion of the body with EMS stimuli, branches of the line (4), in which each branch of the line (4) connects one of the electrodes-EMS (1) in a conductive way of electricity with the stimulation generating unit- EMS (3), to drive this electrode-EMS (1) with the EMS stimuli associated with it, so that current through a predetermined amplitude and frequency pattern is conducted through the body, especially in a number of d circuits and current comprising, respectively, two of the branches of the line (4), which have, respectively, two EMS electrodes (1) associated in pairs with each other, characterized in that the training device (10) presents for protection of the corrosion of the electrode- EMS and / or other elements (5) prone to it at least one of the branches of the line (4), at least one measuring installation (12), to detect in the branch of the line (4) a resistance or a variable, corresponding to the resistance, as a real value, at least one comparison device (13) to compare the real value in the branch of the line (4) with a theoretical value deposited or calculated, and at least one compensation facility (14； 6, 15), to compensate in the branch of line (4) a deviation from the real value of the theoretical value.Dispositivo de entrenamiento-EMS (10), con una unidad de generación de estimulación-EMS (3), que forma a partir de una corriente tomada de una fuente de corriente una pluralidad de estímulos-EMS distribuidos en el tiempo y que siguen un esquema de estimulación predeterminado, y
