Today, combined approaches are used to better understand the neuromuscular function of skeletal muscles in different populations, using simultaneous measurements with the help of electromyography and mechanomyography. This is done in order to of better understanding muscle performance and the conversion of electrical impulses from the nervous system into mechanical work. For this purpose, the index of electromehanical efficiency (EME) of skeletal muscles has been developed, which describes the process of excitation-contraction in active skeletal muscle. The purpose of this master's thesis was to explain the purpose and significance of the EME index, to investigate existing measurement methods, to assess their validity and reliability, and to suggest improvements for future research. The methodology is based on a descriptive analysis of domestic and foreign literature. The search strategy included databases such as PubMed, ScienceDirect, Web of Science, and SPORTDiscus. Based on inclusion and exclusion criteria, 10 studies were ultimately included in the analysis. Key findings include recognizing the EME index as an important diagnostic tool for assessing muscle performance. Higher values of the EME index correlate with better efficiency of muscle contraction, which is important in sports diagnostics and rehabilitation. Due to its usefulness in diagnostics, it is also considered to be of clinical importance. Despite all the advantages, there are also drawbacks, mainly related to non-standardized methodological approaches to the integration of the index. Therefore, further research is needed to standardize integration methods and measurement procedures to ensure a comprehensive understanding of the functioning of the EME index and its application in clinical and sports practice.
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