The apparatus consists of a pulse generator, a control device, and a field generating device which jointly generate a pulsed electromagnetic field, wherein series of pulses that have specific intensities and are applied at specific intervals and at different frequencies influence the pulsation of the field, thus making it possible to cause stimulating effects on homeostatic autoregulatory mechanisms in the organism. The pulsed electromagnetic field of the invention achieves greater changes in characteristics and significantly longer decay times than previously known electromagnetic fields. The long-term effectiveness can thereby be prolonged up to ten fold.