It is not unusual to find in the sports research literature evidence of exceptional functional qualities demonstrated by some outstanding athletes - for example, top maximal oxygen consumption rates in the endurance-intensive cyclic sports. However, it should be emphasized with confidence that such cases are exceptional rather than normal since there are numerous reported cases when ranked on top are the athletes with not necessarily highest functionalities and fitness rates. Objective of the study was to analyze definitions and meanings for the notion of `competitive mobilization efficiency` indicative of the individual ability to win in the situations when the competitors` motor potentials are the same. Results and conclusions. The article discusses the content of the concept of "realizable efficiency" in endurance sports. It is believed that, in addition to the high level of motor potential, sports result is associated with the formation of a biomechanically efficient structure of an exercise. The latter refers to the movement construction system enabling to most closely demonstrate the morphofunctional properties of the athletes' neuromuscular system and the vegetative systems that maintain its functionality. It is noted that multi-year trainings help top-class athletes quickly reach the limit of adaptation of the main functional systems, while increasing the movement speed. This is due to the increased mechanical power of the muscles in the key movement phases. It is assumed that an increase in the output power in terms of stabilization of the functional performance rates can be associated with an increase of the specificity of manifestations of the neuromuscular system qualities under the biomechanical conditions of the muscle work during a competitive exercise, but within the individual movement system, which, in turn, depends on the innate or acquired features of the body`s morphological structures. The notions of competitive mobilization efficiency and sports-specific technical skills need to be interpreted in the context of the efficient movement biomechanics formation process - that means a motor skill design that facilitates the individual morphology and functionality resource of the athlete's neuromuscular apparatus and the relevant autonomic systems being mobilized in full for success of the competitive performance biomechanics.
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