Abstract: A device for treatments on the human body with variable magnetic fields, which is provided with: at least one electric waveform generator to be connected to at least one Helmholtz coil to be brought close to the person or persons to be treated and producing variable low-intensity and low-frequency magnetic fields. The device further includes at least one impedance meters with electrode terminals to be applied to the person in order to assess the effectiveness of the waves of the generator; and at least one electronic processing unit for the management of the waveform generator or generators as a function of the measurements of the impedance meter and of memory parameters stored in the processing unit.