No abstract

The purpose of the investigation was to study the efficiency of measuring markers of oxidative stress and muscle damage in the oral fluid in highly skilled sportsmen under physical exercise for the assessment of their functional state. 70 highly qualified athletes at the age of 16-20 years specializing in the cyclic kinds of sports (track and field, swimming) took part in the investigation. Sportsmen performed the control test which consisted of the series of 3×100 m distances by a flat race with an active 45 s rest between them for the track and field athletes, and 4×50 m by the main swimming style with an active rest between the distances also for 45 s for the swimmers. Activity of creatine kinase, content of lipid peroxidation products in the blood and oral fluid were measured standard biochemical methods. The performance of the functional tests induces the excessive accumulation of toxic products of lipoperoxidation and increases activity of creatine kinase in the oral fluid of highly qualified athletes. Correlation analysis shows, that the intensity of free radical and peroxide processes in athletes can be evaluated by means of the method of measuring the content of lipid peroxidation products in the oral fluid.

Various stress procedures (swimming, hypobaric hypoxia, and exotoxin administration) induced similar changes in electrophoretic mobility of rat erythrocytes. The degree and directionality of phasic changes in electrophoretic mobility depended on the concentration of stress hormones.

Mexicor treatment (8 mg/kg body weight per day) during the posttraumatic period after concomitant traumatic brain injury and acute blood loss in rats increased electrophoretic mobility and concentration of 2,3-diphosphoglycerate, and reduced malondialdehyde content in erythrocytes. These changes improved hemodynamics and oxygen-transporting function of the blood. The most pronounced effects of Mexicor were observed at the early stages of posttraumatic period.