Various parameters of functional states in workers at a logging enterprise in conditions of the Far North at different stages of the shift period

Introduction. Previous studies have identified dynamic changes in the psychophysiological and psychological parameters of the functional states in logging workers during the shift period. The identified changes require clarification of how the various functional states parameters of logging enterprise workers are related at the beginning, middle. and end of the shift period. The aim of the study. To identify and describe the relationship between various functional states parameters in workers at a logging company in the Far North at the beginning, midd,le and end of the shift period. Materials and methods. The study involved twenty seven workers at a logging company. The functional states in loggers were assessed daily in the morning and evening using instrumental methods and testing during a 15-day shift period in July 2024. Statistical methods: descriptive statistics, Kruskal-Wallis test, correlation analysis using the Spearman coefficient. Results. At the beginning of the shift period, a greater number of statistically significant relationships between the parameters of functional states measured using the following methods are observed: 1) the DASRWC, CVMR methods and coefficients based on blood pressure measurements; 2) the subjective comfort method and the parameters of the AngioCode device; 3) G.A. Aminev’s interpretation coefficients for the M. Luscher test and the parameters of the CVMR method. At the same time, for groups 1 and 3, these relationships are consistent (have similar characteristics), and for group 2 – opposite characteristics. Limitations. The study was conducted in one of the Russian regions in the summer, which can be clarified when conducting research in other regions with different climatic conditions and specific terrain. When expanding the samples, it is possible to apply multivariate statistical methods to analyze the results and clarify the findings. Conclusion. The hypothesis that, due to the greater intensity of occupational activity, greater consolidation in the assessments of the loggers’ functional states, measured using psychophysiological instrumental and psychological methods, observed at the beginning and end of the shift period, was confirmed. These differences may indicate to the consolidation of various means of human adaptation in more severe conditions and their measured, time-distributed use in relatively favorable periods.