The article presents the results of serum enzymes study in endurance sports. 311 elite athletes were investigated in swimming, biathlon, cycling, cross country skiing, rowing and kayaking. Capillary blood examination was performed on training camps during ten years. We included in statistical analysis 6950 CK tests, 5904 - AST and 5667- ALT. They were analyzed depending on kind of sport, training stage preparation and gender. The physiological serum enzyme ranges of elite athletes were estimated in view of sport, gender differences and stage of preparation. Serum enzyme activity trend was found in endurance sports at various preparation stages of the annual cycle of training. The high individual variation of CK activity was in endurance sports (variation coefficient 65,0-102,9% for men and 44,0-128,8% for women). It revealed the significantly higher CK activity in men compared to women. The trend of CK activity decrease was found from preparatory to competitive period. We examined the excess frequency enzyme activity higher upper limit of reference ranges for healthy individuals. It was 29,0% for CK, 23,2% - AST and 9,3% - ALT.
serum enzymes, endurance sports, sports biochemistry, laboratory monitoring.
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