[The use of a specialized food product based on fermented milk whey to enhance the adaptive potential of athletes (skiers-riders)].

Specialized sports nutrition is one of the most important factors in the extension of the functional potential of athletes, providing adaptive resistance to physical stress, which determines the high physical performance and prolongs athletic longevity of the athletes. The study involved 30 skiers-racers (the average age of 19.5±1.8 years). 12 skiers of the main group within 21 days consumed a specialized food product, obtained on the basis of fermented milk whey containing amino acids, several vitamins, minerals and trace elements, live culture of lactic acid bacteria: L. lactis, L. thermophilus, L. bulgaricus (1.2×108 CFU/cm3). The control group consisted of 18 skiers, those taking the placebo (food starch of the same consistency). After a course of product intake, blood level of hemoglobin increased by 6%, of leukocytes - by 10% due to an increase in the number of granulocytes by 32%, and segmented neutrophils by 16% (p<0.05), there was a tendency to increase the number of red blood cells by 7% with a significant decrease in lymphocyte count by 19%. Erythrocyte sedimentation rate in blood of the skiers from the comparison group increased by 41% (p<0.05), while in the athletes of the main group it decreased by 16% (p>0.05). After product intake it has been established by the method of laser Doppler flowmetry that there was a tendency to increase blood perfusion by 15%, a statistically reliable increase in the flux by 53%, which is based on the improvement of the internal mechanisms of microcirculation regulation. According to the mathematical analysis of cardiac rhythm, centralization of regulation decreased while the activity of an autonomous mechanism for controlling the work of the heart increased. The revealed functional changes ensured an increase of absolute (by 31%, p<0.05) and relative (by 33%, p<0.05) physical performance and aerobic endurance of skiers, contributed to the improvement of short-term memory. The conclusion is made about the expediency of the intake of the specialized food product to enhance the adaptive capacity of athletes under the influence of systematic physical loads.

[The influence of fermented dairy whey on morphofunctional indices and physical training of sportsmen].

The aim of the study was to examine anthropometry, physical fitness, metabolism at the level of the microcirculation and adaptive processes of the organism as a whole under the inclusion of enzyme-hydrolyzed whey in the diet of 27 weightlifters 17-23 (21.7±2.7) years old, with the level of sports skills of 1 category of up to masters of sports. The body composition was determined by bioimpedance method, functioning of microcirculation system and oxygen transport were determined using the multifunction laser diagnostic complex. For analysis of heart rate variability we used complex "Varicard 2.51", physical fitness was assessed by generally accepted pedagogical tests. The products inclusion in the diet in the increasing dose of 0.5 to 1.5 g/kg of body weight within 21 days increases physical fitness. The growth of physical efficiency provided change of body composition with slight increase in muscle mass by 2% and decrease in fat component by 3.6% (p <0.05). Increasing muscle mass is the functional stimulus for the revitalization of the microcirculation system for the exchange of nutrients and energy. Under the consumption of serum the intensity of microcirculation increased by 131%, elevating dominance of active mechanisms of modulation of the flow over passive. As a result of intensive diffusion of oxygen from the blood into tissues, the saturation rate of mixed blood reduced by 7.7% and consumption of oxygen by cells of work tissues increased by 23.6%. Assimilation of nutrients and energy, adequate to physical exercises, improved functional capacity of the organism in general and extended its adaptive capacity, as evidenced by the increase of the balance of vegetative regulation of cardiac rhythm.

Functional Features of Microcirculation System and its Possibilities of Oxygen Transport in Children and Youths of Bryansk Region in Conditions of Radioecological Pressure.

The questions of influence of low radiation doses on microcirculation of blood in ontogeny of males from 7 to 27 years are presented in the article. Using the method of laser Doppler ultrasounds, optical oximetry and laser fluorescent diagnostics, we studied the blood perfusion level in the microcirculation system of 315 schoolchildren and students, considered the regulation mechanisms of microcirculation, the level of oxygen saturation of hemoglobin both in the circulation system and mixed blood, the index of oxygen utilization in tissues and the value of fluorescent use of oxygen. We received the information about the changes in the frequency of occurrence of different microcirculation types associated with the age and region of residence. In the case of higher radiation levels we marked a significant increase of individuals with the "extreme" microcirculation type (hypoemic and hyperemic) against the background of the decreased mesoemic type. A special feature of the metabolism process in children, teenagers, and youths is a decrease of the microcirculation density with an increase of the myogenic tone of metaarterioles and precapillary sphincters. The tone of arterioles grows with age. As a result of the limited blood volume, oxygen. is pulled compensatory from blood in larger amounts; it is shown from a significant decrease of the level of oxygen saturation in mixed blood. The strongest differences are shown for the hypoemic and hyperemic microcirculation type. Dwelling on the areas with radio-ecological pressure is accompanied by an increase in the fluorescent index of oxygen use. The level of the total oxygen use in these individuals is higher than in those living in radiation favorable areas.

[Effect of helium-neon laser on the microcirculation in blood vessels of the rat pia mater]. / Vozdeistvie gelii-neonovogo lazera na mikrotsirkuliatsiiu v sosudakhmiagkoi obolochki golovnogo mozga u krysy.

The sensitivity of rat's microvessels of microcirculatory bed of brain's pia matter was studied by helium-neon laser radiation. Changes in the reactivity by the microscopy findings were studied on the 7, 30, 45, 60, 90th days of animals postnatal development. Laser radiation was used during 30 min. Local changes in all components of the microcirculatory bed were fixed. It is mentioned that in adult rat the expressiveness of arteriole's local widening reaction in the radiated place reduces, but the degree of the reduction is below or over the radiated place, on the contrary, increases. The arteriole diameter in 30-day old rats increases to 59% in comparison to the initial level, and 90th day old animals--to 16%. The degree of reaction's expressiveness depends upon the microvessel diameter and the animal's age.

[Changes in the reactivity of microvessels of the pia mater system of rats during ontogenesis]. / Izmenenie reaktivnosti mikrososudov pial'noi sistemy krysy v ontogeneze.

Changes in microvascular reactivity in pia mater system have been studied under conditions of bilateral occlusion of common carotid arteries in rats of different age groups. The studies were performed on the 7th, 30th, 45th and 90th day of the postnatal development. The occlusion of common carotid arteries lasted 6 min in week-old animals and 9 min in rats of other age groups. The phase character of microvascular reactivity has been determined. It has been found that dilation of arterioles depends on the age of the animal. So dilation of precortical arterioles averaged 20-25% of the initial level in 7-day-old animals and increased to 60-75% in 30- and 45-day-old animals. It has been determined that the smaller is the diameter of the vessels the more expressed is their reactivity. It has been shown that a steady reaction of compensatory adaptation in microvessels in characteristic only of adult animals.

[Development of the pial microcirculatory system during ontogeny]. / Stanovlenie pial'noi mikrotsirkuliatornoi sistemy v ontogeneze.

Biomicroscopic studies performed in anesthetized white rats revealed the increase in the cortex mass and the formation of microcirculatory bed as the main factors in microcirculation development. Three periods were distinguished in the process of the pial microcirculatory system formation: an excessive blood flow in the primary capillary net (1-7 days); an unstable (translocating) blood flow and formation of definite structure of the microcirculatory bed (7-30 days); a stable blood flow and stabilizing of the microcirculatory bed construction (75-90 days). A possibility of distinguishing the structural-functional units within the pial microcirculatory system and their role in formation of the microcirculation in ontogenesis, are discussed.