Background. The living organism is affected by electromagnetic influences covering a huge range of frequencies and amplitudes. The low-frequency electromagnetic field (LF-EMF) is a popular modality in physical therapy in Poland. As yet no standard frequency or duration of treatment have been determined and no side effects of EMF have been identified. A better understanding of LF-EMF should be based on objective physical measures and evidence-based clinical studies. Material and methods. The physical and technical parameters of the electromagnetic field applicators, in particular a coil mat for whole-body treatment (length 170 cm, width 70 cm) and an applicator for topical use (length 7 cm, width 6 cm) are determined. Besides, the paper reports on determination of the parameters of the generated electromagnetic fields: induction, topography of the field and the temporal profile of the magnetic pulse. Magnetic field induction was measured by a measuring probe calibrated with the use of a magnetometer. The temporal profile of the electromagnetic pulse was determined with a digital oscilloscope to which the probe was connected. Results. The electromagnetic field was very heterogeneous. The value of induction of magnetic field ranged from near zero to 300 tiT for the coil mat and to 4000, μT for the topical applicator and fast disappeared with increased distance from the field source. The frequency of EMF was 30 Hz. The pulse shape was saw-toothed. increased supply program linearly increased magnetic induction. Conclusions. The position of the body during electromagnetic exposure and choice of applicator (coil mat or topical applicator) have a significant effect on the magnitude of electromagnetic exposure.