This brief report presents a description of the basic properties of mitochondria, providing a formation of energy in the human body, the ability to control a formation of energy under the influence of the Mexidol. The authors showed the main physiological effects of Mexidol in athletes and in various pathologies. A comparative study of growth performance of the pressing the barbell in the posture of lying and deadlifts in the main group of 15 people and control of 23 athletes was carried out. The athletes of the main group received the Mexidol in the dose of 200 mg/kg of body weight for 2,5 weeks. The authors found no significant increase of results in this group compared with the control and defined the importance of further studies of the properties of mitochondria and opportunities of the Mexidol in their modulation.