The physiological influence of alternating current electromagnetic field exposure on human subjects

摘要

This study focuses on the acute influence of non-thermal alternating current (AC) electromagnetic field (EMF) exposure (50 Hz, peak magnetic flux density B_max 180 mT, 15-min duration of exposure) on blood flow velocity and electromyography (EMG) in healthy human subjects. The values of the blood flow velocity were significantly increased by the EMF exposure during and after exposure periods compared with the sham control exposure. In contrast, the mean power frequency values in EMG were not significantly changed from the baseline value in the presence of EMF exposure. These results imply that the physiological role of an EMF-enhanced blood circulation might help eliminate the metabolic waste products and endogenous pain producing substances inducing muscle stiffness and pain.