The biomechanical characteristics of technical actions and the issues of the influence of anthropometric indicators of athletes on the use of technical arsenal in impact kinds of martial arts are considered. The analysis of scientific and methodological literature and the results of practical research made it possible to reveal the features and substantiate the ways of optimizing the educational and training process and increasing the effectiveness of competitive activity on the basis of knowledge of the laws of biomechanics and taking into account the individual characteristics of athletes. It was found that when considering the biomechanical characteristics of sports technic, one should proceed from the fact that in biomechanics, almost all movements consist of rotational and translational components. It is emphasized that the height and weight indicators (length and mass of the parts of the athlete's body) affect the moment of inertia and, therefore, the speed, time parameters and energy consumption of technical actions. The realization of the level of readiness and the increase in the effectiveness of the competitive activity of athletes depends on the integral level of their preparedness (physical, technical, tactical and psychological stability).