The influence of low-frequency magnetic field on plasma antioxidant capacity and heart rate.
BACKGROUND
Low-frequency magnetic field is widely applied as magnetotherapy in physiotherapeutic treatment. Recognition of positive and negative effects of the magnetic field has been the subject of numerous studies. Experimental studies concern, among others, the effect of this field on the heart rate and plasma antioxidant capacity. The aim of the study was to check whether a time-variable magnetic field of constant frequency and induction affects the heart rate and plasma antioxidant capacity.


METHODS
The tests were performed on Spraque-Dawley rats exposed to the magnetic field of the following parameters: frequency - 40 Hz, induction - 7 mT, time of exposure - 30 and 60 minutes. The measurements of ECG and plasma antioxidant capacity expressed in the number of reduced iron ions were performed on experimental animals: before, after a single exposure and after 14 days of exposure.


RESULTS
A significant decrease of the heart rate was observed after 14 days of exposure. A variable magnetic field of the parameters: frequency - 40 Hz, induction - 7 mT and exposure time of 14 days caused an increase of the organism antioxidant defence, whereas a variable magnetic field of the frequency of 40 Hz, induction - 7 mT and exposure time 60 minutes for 14 days caused a significant decrease of the organism antioxidant defence.


CONCLUSIONS
The exposure time affects heart rate, plasma antioxidant capacity and the organism defense ability against free radicals.
Katedra Fizjoterapii Wyzszej Szkoły Kosmetologii i Ochrony Zdrowia w Białymstoku. elzbieta.ciejka@gmail.com
Elzbieta B
EB
Ciejka
Anna
A
Goraca
D000818:Animals; D000975:Antioxidants / Q000378:metabolism* / Q000528:radiation effects*; D004562:Electrocardiography; D004574:Electromagnetic Fields; D004781:Environmental Exposure; D006339:Heart Rate / Q000528:radiation effects*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley
D000975:Antioxidants