The aim of double-blind, randomized and placebo-controlled study was to determine the therapeutic effect of pulsed electromagnetic fields (PEMF) therapy in treating chronic low back pain. The subjects were randomized
into two groups: magnetotherapy group = 33 subjects, placebo group = 27 subjects. The group treated with magnetic field in solenoid received the therapy for 3 weeks – 5 times per week, total of 15 therapies. Magnetotherapy data: pulsed electromagnetic therapy, B_max = 0,681 mT, frequency 10 Hz, vector dB/dT = 0.976 mT/s, duration of therapy 20 minutes. In both groups the level of pain measured with VAS decreased and the function assessed with the Oswestry Disability Index improved immediately after the therapy and one month after the completed therapy, however the differences among groups were not statistically significant. Magnetotherapy with PEMF parameters and placebo therapy decreased the level of pain and improved the function in subjects but the differences between groups were not statistically significant.