We have plenty of users that use NuCalm in conjunction with other products, such as PEMF mats and the Bemer [grounding mat]. The body's gauss field is only necessary to activate the disc. Please note, that we've not done any clinical testing with the two products together, so understand that it could still be possible that the EMFs [Earth's electrical current in the case of the grounding mat] may affect the disc the quality of your session. This is something I would test out for yourself. Many users haven't noticed any differences and enjoy killing two birds with one stone!