Objective: 

In our study, it was aimed to investigate the relations between the muscle damage, the changes in the TOS, the liver enzyme levels and the use of CoQ10.

Methods: 

The treatment in the control groups was planned to be 100 mg and 200 mg of CoQ10. During the research, three groups followed a training programme with 70–80% maximum repeated 2 hours every day, every day for one week. Before and after the training the blood was taken two times from the sportsmen to identify enzyme activities CoQ10, with TOS, AST, ALT, ALP, GGT, LDH and CK. The blood samples were analyzed in the laboratory of Kafkas University Medicine Faculty. The levels of CoQ10 and the TOS were measured using HPLC and the kit of TOS acording to the manufacturer's instructiens

Results: 

When the CoQ10 and TOS levels of Endurance Skiers were compared before and after the training; althogh it was understood that these was an increasing having level of p<0.01 there was a decrease in the TOS levels experimental group about using of CoQ10; However, it was understood that here were important increases (P <0.001) in the levels of AST, ALT, ALP, GGT, LDH and CK. But, about the experiment group it was found these were decreases in value of the activity of enzyme (p <0.05).

Conclusions: 

As a result, it was understood that the levels of TOS, liver and muscle activities of experimental group were lower than the control group and the reason of this result may depend on the use of CoQ10.