Annotation. Study of modern laboratory markers of structural and functional disturbances of muscle tissue in athletes, reflecting energy metabolism, paravertebral muscle damage, and being an indicator of body performance and muscle activity, is of undeniable practical importance for modern sports medicine. The aim of the study was to determine clinical and biochemical parameters of blood in volleyball players and wrestlers in assessment of structural and functional changes in skeletal muscles. Blood examination was carried out in 26 volleyball players and 25 middleweight Greco-Roman wrestlers as part of repeated comprehensive medical examination being conducted at the Department of Physical Education of Vinnytsia National Pirogov Memorial Medical University. Eligible subjects included athletes 17 to 21years of age having first adult category to master of sports and being in preparatory period of annual training macrocycle. The athletes were examined in the morning, on empty stomach, not less than 12 hours after training. The control group consisted of 25 practically healthy students having moderate physical activity. Clinical blood indices were determined by conductometric method on an automatic hematology analyzer ABX HORIBA PENTRA 60 C + (France). Hormonal studies were carried out by immunochemiluminescence method on automatic analyzer “ACCESS-2”, Bekchman Coulter (USA). Biochemical studies were performed using an automatic analyzer AU-480, Bekchman Coulter (USA). Electrolyte content was determined by ion-selective electrode technology on Medica electrolyte analyzer in EasyElectrolytes™, using lithium heparin vacuum system. Glucose levels were determined on automatic analyzer Biosen (Germany). Statistical processing was done using the program “Statistica 5.5”. Significance of differences between the variables was determined by Mann-Whitney U-test. The following serum humoral factors were found to be of great significance in assessment of structural and functional changes in skeletal muscles in volleyball players and wrestlers: the number of large immature cells of monocytes and platelets, electrolyte content, concentration of creatine phosphokinase and lactate dehydrogenase, creatinine level, as well as triglycerides and lactate levels. Establishing blood biomarkers should be an integral part of scientific and practical monitoring of health status in team athletes and wrestlers.