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Int J Sports Med 2003; 24(5): 359-362
DOI: 10.1055/s-2003-40699
Physiology & Biochemistry
© Georg Thieme Verlag Stuttgart · New York

Training Induced Alterations of Visual Evoked Potentials are not Related to Body Temperature

Y.  G.  Ozkaya1 , A.  Agar1 , G.  Hacioglu1 , P.  Yargiçoglu2 , I.  Abidin2 , U.  K.  Senturk1
  • 1Akdeniz University, Faculty of Medicine, Department of Physiology, Arapsuyu, Turkey
  • 2Akdeniz University, Faculty of Medicine, Department of Biophysics, Arapsuyu, Turkey
Further Information

Publication History

Accepted after revision: December 30, 2002

Publication Date:
17 July 2003 (online)

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Abstract

The purpose of this study was to investigate the effect of mild chronic exercise on visual evoked potentials (VEPs). Twenty male Wistar rats were randomly divided into two groups: Control (C) and Exercise (E) groups. Exercise was performed on a motor-driven treadmill for 8 weeks. After 5 min of exercise, plasma lactic acid levels were determined. At the end of the experimental period, VEPs were recorded from E group twice: Five min (E-5 min) and 24 h (E-24 h) after the last bout of exercise. During visual evoked potential (VEP) recordings body temperature of the animals was kept constant to eliminate the effect of temperature changes. No difference was found between the lactic acid levels of two groups. The mean latencies of VEPs from E-5 min were shortened compared with the control group. The mean latencies of VEP components in E-24 h were observed to have returned to the control levels. Peak to peak amplitudes of VEPs were found to be unaltered among all measurements. We concluded that immediately after exercise, VEPs latencies were shortened independently from body temperature via unknown mechanisms. The latencies of VEPs were returned to control values after 24 h.

Key words

Lactic acid - rat - chronic exercise - aerobic exercise - evoked potentials

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Y. G. Ozkaya

Faculty of Medicine Department of Physiology · Akdeniz University

Arapsuyu · Turkey ·

Phone: +90-242-2274483

Fax: +90-242-2274495

Email: gulozk@yahoo.com