The Relationship between Heart Rhythm Variability and the Heart Rate in Adolescents and Young Adults
In this article, we study the degree of dependence of heart rate variability in healthy adolescents and young adults on the average rhythm frequency. In the study group, heart rate variability decreased as heart rate grew. Although there was no difference in the increase in the heart rate, the variability of the ...
Comparison of heart rate parameters in students with different achievements in rest and conditions of short-term mental stress
Frequency and variability of heart rate served as instruments to assess the stress resistance of two groups of students with different average academic performance in different periods of the educational process: at the beginning and at the end of the autumn semester. Mental stress always ...
Young ‘s body mass index and its im¬pact on the frequency and variability of the heart rhythm at quiet and after phy¬sical load
A medical examination on a selected group of young people demonstrated a negative correlation between the body mass index and the heart rate at rest, which disappeared after some physical activity. Physical activity was observed to change the heart rate variability under the influence of the changes magnitude in the initial heart rate. No correlation between body mass index and heart ...
On the birth rate structure of the Kaliningrad region population in the late 1940s — 1950s
The article is discussed about the structure analysis of the birth rate of the population of Kaliningrad region in 1949—1950th against All-Russian (RSFSR) and some regional indicators, drawn the conclusion about considerable originality of the structure of the birth rate as well as about greater significance of the ...
Daphnia magna Straus (1826) (Cladocera, Crustacea) as a test object for assessing endocrine disorders in aquatic organisms
This article examines the effect of prednisolone – an analogue of the ver-tebrate hormone hydrocortisone – on the activity of somatic growth, blood sys-tem function, fecundity, and reproductive rate in Daphnia Straus (1826) (Cladocera, Crustacea) in three consecutive generations. This hormone had a proven effect on the studied morpho-functional characteristics of Daphnia. It indicates that the test object is sensitive to exogenous hormones, ...
Changes in prices for basic consumer basket goods: The case of the Kaliningrad region
This article presents the results of a study into changes in prices for goods constituting the minimum consumer basket. The analysis uses the indicative method based on studying variations in the chain growth rate of prices, trends method, and time series variation. The calculations made it possible to describe changes in prices for staple food in the Kaliningrad region over the past ten years.
1. Борисова А. А., Ермолаев М. Б. Проявление ...
