The goal of this clinical trial is to learn if CoQ10 amplifies endurance training-induced myokine and exerkine secretion and if those changes influences cognition in long-distance runners. Does 4-week high-dosage CoQ10 supplementation increase the secretion of myokine, exerkine sercetion? Does the above-mentioned intervention improve the cognitive function in long distance runners? Participants will: Take CoQ10 or a placebo every day for 4 weeks. Visit the laboratory once every 4 weeks for checkups and tests. Keep the participants' food and training diary.
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Change in cognitive funtions as a result of CoQ10 supplementation measured via cogntitive function test.
Timeframe: The investigators are going to check this hypothesis after 4 weeks of high-dose supplementation with CoQ10
Change in myokine and exerkine concentration in the blood plasma as a result of CoQ10 supplementation.
Timeframe: The investigators are going to check this hypothesis after 4 weeks of high-dose supplementation with CoQ10