The paper presents the results of the tremor analysis carried out in two groups of women living in the North of Russia, aged 30 to 32 years old regularly engaged in physical training and not engaged in physical training. On the basis of methods for calculating the parameters of quasi-attractor in two-space dimension as a quantitative measure of real changes in neuromuscular system parameters of women with different fitness level, spaces of the quasi-attractors were used. In simplistic terms the indicator of quasi-attractor areas has already shown differences between trained and untrained individuals. It has been stated that the range of values of quasiattractor's squares in trained women varies from 0,02x10-6 to 0,96x10-6 (a.u.) and in women without physical training - 0,14x10-6 to 5,60x10-6 (a.u.). Statistical data processing has revealed differently directed changes of the studied parameters depending on the degree of women's physical training. The median values of the quasi-attractor squares were 0,82 (a.u.) in the group of women without physical training and 0,15 (a.u.) in trained women.

The aim of the study was to assess temporal trends in health risks related to most common persistent contaminants, including polychlorinated biphenyls (PCBs), dichloro-diphenyl-trichloroethanes (DDTs), lead (Pb), as well as mercury (Hg) among indigenous peoples living in coastal areas of Chukotka in Arctic Russia. This is examined in relation to exposure pathways and a range of social and behavioral factors capable of modifying the exposure to these contaminants, including place of residence, income, traditional subsistence, alcohol consumption, and awareness of risk prevention. The primary exposure pathway for PCBs is shown to be the intake of traditional foods, which explained as much as 90% of the total health risk calculated employing established risk guidelines. Nearly 50% of past DDT-related health risks also appear to have been contributed by contaminated indoor surfaces involving commonly used DDT-containing insecticides. Individuals who practiced traditional activities are shown to have experienced a 4.4-fold higher risk of exposure to PCBs and a 1.3-fold higher risk for DDTs, Pb, and Hg. Low income, high consumption of marine mammal fat, alcohol consumption, and lack of awareness of health risk prevention are attributed to a further 2- to 6-fold increase in the risk of PCBs exposure. Low socioeconomic status enhances the health risks associated with exposure to the persistent contaminants examined.

No abstract

In the dynamics of the annual cycle (January, April, June, October) for 35 men and 35 women aged 18-22, born and permanently residing in the European North (64° N), there were determined the electrocardiograms’ amplitude-time characteristics. It has been established that in the annual cycle, the myocardium highest electrobiological activity was observed in the mid-seasons (autumn, spring). Seasonal changes of the cardiac muscle electric activity touched on the left heart greater than the right heart.