The purpose of the research was to study the skin neurovascular apparatus physiological maker in young athletes during the pre-season of the yearly training program.
When investigating local dermographism (the pencil for dermatographs of V.A. Madorsky) the time of its emerging (the dermographism latent period), and also the duration and color were taken into account. The force of pressure of the dermograph on skin made 200 and 500 grams. The skin response reaction on the pressure of 200 grams was considered. The rest observations were used only for defining the adequacy of the skin reaction to the irritant force.
31 young track-and-field athletes aged from 12 to 16 (the second junior - the first senior degree) took part in the examination. Different factors of the latent period norm and dermographism duration, according to different authors´ findings (V.A. Grebennikov, V.D. Vetchinkin, 1985; P.Ya. Yakobson, 1994), depending, as it seems, on the difference between the research methods of this factor, served the basis for the local vascular reactions investigation in 30 apparently healthy coevals of the control group.
As the result of the carried out control studies and statistical treatment of the findings the dermographism latent period duration norm, made 5,1±0,9 sec, and the duration of its existence from 4,5 min to 8 min have been determined. Considering the fat that it is inappropriate in practice to determine the duration of the dermographism latent period in fractions of a second we think it is possible later on in our further work to take the latent period of 4-6 sec for the norm. The dermographism latent period duration characterizes the skin neurovascular apparatus affectability. The analysis of the findings testified that in 17 (54, 8%) examined athletes a normal affectability of the skin vasomotor system was observed, in 12(38, 9%) examined sportsmen - the skin vasomotor system affectability was lowered, and in 2(6, 3%) - it was increased. Summing up, it is necessary to note that the lowered affectability of the skin vasomotor system in young athletes is registered considerably more often compared to the increased one. In accord with the dermographism duration the following results were obtained: in 20(64, 5%) examined persons a normal in time dermographism (the dermographism duration of 4 min 30 sec - 8 min); in 9(29, 1%) - an inert in time dermographism (the dermographism duration of not more than 8 min); in 2(6, 4%) examined persons - a quickly disappearing dermographism (the dermographism duration of 1-4 min 29 sec).
Thus, when investigating the latent period and the duration of dermographism in young athletes, in more than a third of them the skin neurovascular apparatus functional status disturbance has been established.
The study of dermographic lines´ coloration in young athletes and persons of the control group didn´t make it possible to register a substantial difference. Practically in all the examined the lines colored from pink to red emerged at the dermograph pressure of 200 and 500 grams. That is, the color study in young track-and-field athletes hasn´t given fresh information for the judgement about the skin vasomotor system functional status.
The changes on the part of the skin neurovascular apparatus in young track-and-field athletes detected by us testify to some extent to the adaptation mechanisms of physiological processes regulation, the vegetative nervous system in young sportsmen in particular.The article is admitted to the International Scientific Conference "Fundamental and applied problems of medicine and biology" young scientists´ section, United Arab Emirates (Dubai), 16-23th October, 2007, came to the editorial office on 09.11.07.