In some cases at a combination of high temperature to the expressed physical activity of the person within many hours the organism can allocate more than 10 l of liquid only as a result of sweating. However intensive and plentiful sweating for an organism is unprofitable. Sweat flows down drops and adequately is not used for return of heat by evaporation of moisture from a body surface.
Whether so it? Let's check. On how many degrees the temeratura of skin after intensive grinding can raise? It appears, on 2-4 °C and more in comparison - with initial size. Speed of course of thermorecovery processes thus increases after cooling by 2-3 times.
Thus, the additional influences considerably increasing skin temperature and by that the coolings of a body interrupting process are not always expedient. It is possible to use them at the very beginning of a hardening, at a hardening in the special mode, in case of need the urgent termination of process of cooling of an organism.
The heatregulatory device acts much better on body sites which constantly are affected by meteorological factors (the person, hands), and worse on constantly closed by clothes (a breast, backs.
The increase in a blood-groove through skin vessels occurs due to reduction of its volume in a liver and a spleen. Blood from these depots comes to the general circulation. The increase in volume of the circulating blood and the area of its contact with environment in turn promotes increase of a thermolysis of an organism.
So, a systematic hardening - the tested and well-tried improving remedy! However big use will not be if when carrying out the tempering procedures to neglect those principles which are developed by practical experience and are supported with medicobiological researches. The most important of them - systematicity, gradualness and sequence, the accounting of specific features, a combination of the general and local procedures, the active mode, a variety of means and forms, self-checking.
One more council: to avoid the unpleasant consequences connected with the aggravating effect which is had experience, intellectual overfatigue, a physical overwork in combination with cooling, water temperature or air used for a hardening, it is necessary to raise by all means.
The organism adaptation to the increased temperature considerably is accelerated when the person is not at rest, and makes muscular work. English experts created climatic conditions of the African desert in thermal chambers. Examinees were exposed to intensive physical activity. Many first very hard transferred a heat and at the end of one-day research were close to a starvation. However for the 4-7th day regulatory systems started adapting and operability of an organism considerably increased. Adaptation to a heat proceeded much easier if warmings up repeated several times a day.
If every day systematically to repeat cooling of feet with cold water, these phenomena from mucous membranes gradually disappear, and in 2 months fade absolutely or remain ill-defined.
At strong and sharp Holodov influences thermoreceptors react to irritation, urgently including in activity physical, and then and chemical forms of thermal control. Traditional recommendations about a hardening oblige to carry out after water coolings grinding of skin before emergence of pleasant feeling of heat, before reddening, and also to apply intensive massage or self-massage.
Pertinently to mention and time of approach of active sweating. If at the beginning of accustoming by a heat time necessary for active inclusion of system of sweating can be quite long, in the course of thermal adaptation it is considerably reduced, and the gap between the beginning of heating and sweating is reduced to a minimum.
As an indicator of resistance of the person to fall of temperature of environment at researches so-called holodovy test is used. Thus the speed of restoration of temperature of a site of skin up to the initial size after the dosed cooling on 10 °C is considered. It is proved: the time of restoration of temperature, the expressed hardness is less.