[Prevention of trace element deficiency in young athletes during year-round training].
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Biomedical subjects
Publications and source records attributed to S M Voronin.
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Examinations of 22 young unarmed self-defence sportsmen and 18 untrained schoolchildren indicated that the indices of nonspecific immunity defence--serum complement and lysozyme--depended on a season rather than on a motor activity regimen. Changes in the concentrations of hemoglobin and plasma iron were also obviously seasonal. These indices were the least in spring and winter as compared to autumn and winter. Blood iron levels were higher in the young sportsmen than in the untrained schoolchildren at all stages of a follow-up. There was a direct relationship between direct and indirect parameters of iron exchange, physical fitness, and nonspecific protection factors. In all teenagers, the activity of serum lysozyme and complement was directly related to the plasma level of iron and the school children's physical fitness was closely correlated with plasma and blood cell iron concentrations.
Examinations of 29 female students of a study medical group have ascertained that daily addition of vitamins (ascorutin, thiamin, riboflavin, pyridoxine, cyanocobalamin, and folic acid) to a diet resulted in a slight enhancement in trace element metabolism and hence in an increase in the intestinal and renal excretion of iron, copper, and manganese. Two-week dietary supplement of vitamins in combination with trace elements (iron, copper, and manganese) caused a considerable retention of iron and manganese concurrently with a higher excretion of copper from the body. At the same time, the higher rate of hemopoiesis and the elevated plasma levels of iron and formed blood elements, and the rise in non-specific responsiveness and physical fitness were more noticeable as compared to their normal values. A significant positive correlation was found between the direct and indirect indices of iron metabolism on one hand and the parameters of natural immunity defense and physical fitness on the other.
The studies of 39 high-grade unarmed self-defense sportsmen established that enrichment of diets with a complex of vitamins and trace elements in combination with adaptogens in the summer period of training was followed by an increase in the concentration of iron in the plasma and blood corpuscles and in the count of red blood cells, the supply of vitamin C, and the level of efficiency. With a significantly improved iron metabolism, the parameters of immunological responsiveness substantially increased. At the same time the greatest increase in the proportion of performance and natural, cellular, and humoral immunity was observed in the sportsmen taking micronutrients with eleutherococcus, and ginseng in particular, as compared with those using a vitamin-micronutrient complex with dibasol.
In athletes of high skills, a 5-percent decline of the body weight over 5 days by means of restricting water, fats and carbohydrates consumption was followed by reduced activity of ceruloplasmin and lysozyme of blood serum. After sauna attendance with a purpose of lessening the body weight, there was, along with a certain rise of the immunologic responsiveness of the body, a decrease in peroxidase activity, in the content of iron and copper in blood cells in the presence of appreciable losses of trace elements with sweat. Enrichment of the athletes' diets with trace elements combined with vitamins and bendasole hydrochloride in the course of sauna-induced body weight lessening not only prevented the negative alterations but also exerted a beneficial action on the function of certain body systems.