Abstract: The aim of this research was to investigate the effects of water and sport beverages on biochemical and physiological variables in trained wrestlers. 21 young trained freestyle wrestlers (age: 22.29+0.9 yr, weight: 75.45+12.9 kg) were randomly divided into Group-1 (1 g. D-glucose per 1 kg of body weight), Group-2 (water) and Group-3 (non-beverage). The blood samples were gathered before, immediately and 30-minutes after a wrestling-technique based circuit exercise measuring plasma volume, Interleukin-6, testosterone and cortisol. The results showed that testosterone/cortisol ratio was higher in Group-1 compared with Group-2 and in Group-2 compared with Group-3 (p<0.05). Plasma volume was lower and Pressure perception and Interleukin-6 were higher in Group-3 than Group-1 and Group-2 (p<0.05). It can be concluded that if beverages are not consumed in wrestling intervals, it can cause not only negative physiological and biochemical effects, but also mental pressure on wrestlers so their sport performance may be negatively affected.

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