The article is devoted to the peculiarities of stress resistance among students of the medical University. It is difficult to overestimate the importance of stress hygiene during higher education. Problems with academic performance create discomfort for the student and, of course, increase the overall stress. The purpose of the work is to study the specifics of the influence of certain factors on the overall picture of educational stress in students and their stress resistance. With the help of the methods «Test for learning stress», developed by Yu. V. For the distribution of students into groups depending on the number of academic debts and the "Self-assessment Test of stress resistance" by S. Cohen and G. Willianson, an analysis of the stress resistance of 92 students of the Medical Faculty of the Yaroslavl State Medical University was conducted. As a result of the current study, the main indicators that affect the manifestation of stress in students were identified, such as: workload during study, fear of the future, lack of self — discipline, as well as predictors (prolonged sleep, communication with family, a break in school) that affect its frequency and duration. It is established that the main causes of stress among students are: irregular meals, living away from family, as well as living in a hostel with other students, fear of the future. All this leads to the appearance of behavioral and biological indicators of the severity of stress, which students can reliably determine by depression, fear, anxiety, excitement, difficulty breathing in preparation for the session, as well as headaches and other pains, dry mouth when passing the exam. Based on the study, recommendations have been developed to increase the level of stress tolerance in medical university students.

The article presents the results of the assessment of the functional state of the organism in workers of harmful industries of the electrical industry of Rybinsk. The complex influence of harmful production factors on the system of regulation of cardiac activity in employees of the enterprise has been revealed. It is proved that the workers of group I (production using rubber compounds) The wave characteristics of heart rate variability (HRV) are reduced compared to the control (group III), which indicates a decrease in the current functional state. The wave characteristics of HRV in group II workers (production using plastics and polyethylene) have a decrease at the beginning of their work and an increase in spectral capacities with a work experience of 5–10 years compared to group III. The results obtained show that certain HRV values in group I are characteristic of the older age group and indicate a high degree of vulnerability to environmental factors.

The article presents the features of bioelectrical processes in the myocardium of premature babies with different gestational age in the neonatal period. The analysis of quantitative electrocardiographic indicators revealed the features of the parameters of the terminal part of the ventricular complex associated with the degree of maturity and age of newborns. At the same time, it was found that during the first month of life in very premature babies significant changes in homeostasis and morphofunctional state of various vital organs and systems occur.

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