Background. Recently, there has been an increase in the prevalence of gastroesophageal reflux disease (GERD) in Northern Europe, North America and East Asia. However data on GERD prevalence in Russian population are very limited. Aim. To determine the prevalence of GERD among the population of Russia, the clinical spectrum of GERD symptoms, the main drugs used for GERD treatment, and the rate of their administration. Materials and methods. The study was conducted from November 2015 to January 2017 in 8 cities of Russia. A survey of patients over the age of 18 years old visiting outpatient medical institutions for any reason, including patients without gastrointestinal complaints was carried out using a short version of the Mayo Clinic questionnaire. Results. In total, 6132 questionnaires of patients aged 1890 years were analyzed [2456 men (40.1%) and 3676 women (59.9%), mean age 46.615.4 years]. The GERD prevalence among the interviewed patients was 34.2%. The incidence of GERD increased depending on body mass index and the age of the patients. Medications used by the patients for heartburn relief included proton pump inhibitors 59.96%, antacids 67.92%, H2-histamine receptor blockers 11.42%, alginates 18.41% of patients. Conclusion. The results of this study indicate a high prevalence of GERD among residents of Russian cities applying for primary health care (34.2%). In comparison with previous studies, an increase in the proportion of GERD patients taking proton pump inhibitors was noted; in most cases the regimen of their intake was in accordance with the recommendations.

Aim. To assess the impact of lockdown measures during coronavirus disease 2019 (COVID-19) pandemic on physical activity (PA) of the adult population in Russia.Material and methods. The online survey was conducted during the period of strict restrictions in Russia from April 26, 2020 to June 6, 2020. The survey involved respondents aged ≥18 years. Participants reported the frequency and duration of moderate to high-intensity PA, as well as walking and other types of exercise, before the pandemic and during the last seven days during the survey period.Results. In the country as a whole, there was a decrease in all types of PA during the pandemic. The proportion of participants who met the World Health Organization recommendations for any type of PA decreased from 68 to 49% (p<0,001). Proportion of those who followed the World Health Organization recommendations for strength training for ≥2 days per week decreased from 53 to 45% (p<0,001).Conclusion. The results of the study are the evidence base to substantiate the feasibility of measures aimed at correcting the lifestyle of the population in the context of the COVID-19 pandemic.

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This paper describes complex geophysical studies conducted on an asar body in the Kaluga region. In particular, the anomaly of the apparent polarizability is studied. Complex interpretation of geophysical data, comparison with drilling results, as well as measurements on drill samples made it possible to define the nature of the anomaly and confirm the presence of areas with a high percentage of magmatic gravel and cobble within the sand-gravel deposit, which are characterized by high values of electrical polarizability.