The electrodes can be placed on any chosen, superficially located muscle. For exercises and EMG measurements, they should be located about 3 cm apart, in the middle of the belly of the tested muscle. In the case of electrostimulation on the belly, at a certain distance from each other. It is also necessary to remember about the polarity of the electrodes – the appropriate position of the anode and cathode (the interface contains auxiliary illustrative illustrations, indicating both the location and polarity of the electrodes). During exercises and EMG assessment, polarity does not matter.