Strong cognitive and muscular reactions are needed in high-speed, decision-making sports like épée fencing, in which the participants need to have quick responses to changeable stimuli and retain sharp concentration. This paper set out to create and standardise a new testing tool to gauge attention concentration and motor reaction in épée fencers with the aid of an electronic measuring apparatus and an electronic microcontroller-controlled framework. Randomized visual sequences and conditions with distractions of different levels were included in this test to represent the competitive conditions of the real world. The fencers were divided into 34 advanced fencers who were examined in two conditions (without distractions N1 and with distractions N2). The effectiveness of the instrument was verified by statistical analysis where descriptive statistics, Z-scores, T-scores, and reliability testing were used. Findings indicated that there was significant inconsistency in cognitive-motor performance in the fencers, most scored within the Good to Very Good category, but some were impaired in either of the two aspects. The research presents normative values of performance, which allows objective evaluation of athletes and data-based training pathways. These results cannot be overemphasised as to the topicality of considering cognitive-motor training strategies in the specifics of fencing development programmes and open new opportunities in the context of evaluating technologies and sports performance optimisation. The next step of research will be conducted on cognition, AI-based performance and VR simulation to design attention-motor response training interventions on the long-term basis.