In addition to chemical pollutants of air, water and soil, hygienists are Stanozolol benefits attracted by the physical environmental factors: noise and microwave radiation.
The problem of city noise is far from new: cities have never been a “quiet” place since their formation; noise is their constant companion stanozolol fat loss. However, in the 20th century, the problem of street noise became extremely acute. The intensive growth of cities, the emergence of new “industrial” and transport sources of noise have put this problem among the most important environmental problems of the century, directly and directly affecting the well-being and health of urban residents.
Sources of noise The main culprits of urban noise are industrial enterprises located within the city limits: gas turbine power plants and compressor stations, metallurgical and machine-building plants, construction and woodworking factories and plants, as well as printing houses, garment factories and other enterprises.
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Not a smaller role falls to the share of transport stanozolol capsules. The impact of traffic noise is constantly growing with the growth of the road network and the increase in the city’s car fleet. Noises from various sources overlap each other in space — areas of acoustic discomfort (sound inconvenience) arise. Unfortunately, the vast spaces of modern cities can be attributed to areas with excessive noise levels.
Effect of noise on the human body Noise in the city is a constant irritant of the central nervous system that can cause it to overstrain. Residents of noisy areas are more likely to suffer violations of the cardiovascular system stanozolol steroid results. A study of the overall incidence of the number of sick-lists during the year showed that employees of institutions located in noisy streets were sick more often than people working in quiet areas. Not only does the frequency of the disease increase, but almost twice their average duration.
The noise level is measured in decibels stanozolol tablets benefits. The harmful effects of noise start at 80 decibels (dB). In our country, as in other developed countries, noise levels are monitored in large cities, acceptable levels are established and noise control measures are taken: detours are built, forest protection belts are created that can reduce noise load by 2-3 times.
Noise especially interferes with difficult mental work that requires a lot of attention. The noise intensity at this time should not exceed 45 dB, with other types of work – 60–70 dB. For comparison, you can specify that the usual noise in nature or muffled noise in a residential area reaches a volume of 20-30 dB. Such sounds do not disturb even the sleep of a person stanozolol tablets benefits. Sounds with an intensity of 30–60 dB are referred to as “relative” noise. The comparative contribution of various sources to the general noise background of a modern city is presented in Table. one.
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Table 1 winstrol stanozolol results. Comparative assessment of the main sources of noise
Measures to combat noise The main measure to combat noise – the right building. Hygienists along with city planners suggest placing non-residential buildings between highways with heavy traffic and residential neighborhoods. Also useful is the location along the highways of the house-screens winstrol stanozolol dosage. For example, one-two-storey stores, standing in the first row, reliably protect residential areas from traffic noise, reducing it by 20-30 dB. Naturally, the role of screens should not be performed by children’s institutions, hospitals, pharmacies, libraries, and any other institutions that require silence.
When designing the construction and reconstruction of cities, it is necessary to make wider use of dense green spaces along noisy highways.
In buildings located along the carriageway, special protective structures are used: increased glass thickness, large interwindow air gaps, noise protective ventilation windows, etc.
Special noise protective measures associated with the design and construction of roads stanozolol benefits. Highways located below the level of residential buildings reduce noise by 15–20 dB. It is especially desirable at the edges of the grooves dense planting of trees and shrubs. Other noise protection measures are also known abroad: special rubber coatings, cars with effective silencers, all kinds of wall screens, etc. In our country, these affordable measures to combat noise have not yet received proper development stanozolol weight loss. Questions for self-control
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1. Basic principles of the organization of the daily routine.
2. The skin as an organ, especially the structure, function.
3. Prevention of athlete’s athlete’s disease.
4. Benefits of winstrol tablets. Rules and regulations of personal hygiene rights.
5. Prevention of myopia and hearing loss.
Man needs air to breathe stanozolol review. It plays an important role in the heat exchange processes of the body. Adverse air changes can cause significant disturbances in the body: overheating or overcooling of the body, hypoxia, impaired performance, the occurrence of infectious and other diseases stanozolol 50mg tablets. The influence of the air environment occurs through the action of climatic and weather factors, which can have an indirect effect on a person, changing the hygienic properties of dwellings, clothing, soil, etc.
In populated areas and enclosed spaces, the air is constantly polluted and changes its properties, therefore there is a need for its sanitary protection from pollution and constant sanitary control of its properties. Important hygienic importance is the condition of the air environment during muscular activity, including during exercise, which is associated with an increase in pulmonary ventilation, large heat generation, etc.
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When hygienic air assessment takes into account the following factors:
1) physical properties (atmospheric pressure, temperature, humidity, speed, direction of movement, cooling capacity, electrical state, radioactivity, etc.);
2) chemical composition (constant components of air and foreign gases);
3) mechanical impurities (content of dust, smoke, soot, etc.);
4) bacterial contamination (the presence of microbes in the air).
Since the above factors of the air environment act on the body in a complex, it is customary to consider the impact of each of them only conditionally in hygiene. Indicators of the physical properties of air are usually called meteorological factors winstrol benefits. The hygienic characteristics of the air environment are given on the basis of a comparison of research results with hygienic standards. This takes into account the impact of air on the health and performance of people.
In sports practice, air hygiene research is of great importance. It allows you to timely take the necessary measures to ensure optimal conditions for those engaged in physical culture and sports.
2. 1 stanozolol oral cycle. Air temperature The hygienic value of air temperature is determined primarily by its effect on the heat exchange of the organism, which is one of the types of interaction of the organism with the external environment. Due to the perfection of thermoregulation mechanisms controlled by the central nervous system, a person adapts to different temperature conditions and can briefly tolerate significant deviations from optimal temperatures.
The bulk of the heat is lost from the skin by:
– radiation to colder surrounding objects (about 45%);
– conduction, or convection, that is, layer-by-layer heating of air adjacent to the body and usually in some movement (about 30%);
– evaporation of moisture from the surface of the skin and mucous membranes of the respiratory tract (about 25%).
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The values ??of heat loss are approximate and characteristic of the state of rest at room temperature. With high or low air temperature and during physical work, these values ??change significantly winstrol effects. However, no matter how perfect the processes of thermoregulation, with significant fluctuations in external temperature, they sometimes can not provide thermal equilibrium of the body.
At low air temperature, due to significant heat transfer, hypothermia may occur in the body, at which circulatory disturbance occurs, and the body’s immunological properties decrease. Hypothermia contributes to colds, as well as diseases of the peripheral nervous system, muscles and joints. Along with these general disorders, local disorders may also be noted: frostbite of the arms, legs, ears, nose, etc. When performing physical exercises under conditions of low external temperature, there is a danger of damage to the muscles and ligaments, as this decreases their elasticity.
Under conditions of high external temperature, overheating of the body may occur due to the difficulty of heat transfer. In a person at rest, disturbances in thermoregulation are observed when the air temperature exceeds 30–31 ° C (at a relative humidity of 80–90%) or 40 ° C (at a relative humidity of 40–50%) oral stanozolol cycle. Naturally, when performing muscular work, overheating may occur at lower air temperatures. It should be noted that when the air temperature is above 38–40 ° C, heat accumulates in the body also as a result of the heating effect of the air and surrounding objects.
In residential premises, depending on the climatic conditions, the following air temperature norms are recommended: for a cold climate – 21 ° C, for moderate and warm – 18–19 ° C, for a hot climate – 17–18 ° C. The difference in air temperature horizontally (from walls with windows to opposite walls) should not exceed 2 ° C, and vertically (from floor level to head level) – 2.5 ° C.
Temperature standards in indoor sports facilities in accordance with SNiP 11–76–78 are characterized by the following values. Sports halls designed for 800 and more spectators – + 18 ° C in the cold period of the year with a relative humidity of 40–45% and no higher than + 25 ° C in the warm period of the year with a relative humidity of 50–55%. Sports halls designed for 800 or less spectators – + 18 ° C during the cold period of the year and not more than 3 ° C higher than the calculated outdoor temperature in the warm period of the year. Gymnasium without seats for spectators – + 15 ° C winstrol effects. Indoor skating rinks without seats for spectators – + 14 ° C. Shooting galleries and fire zones of covered shooting galleries, as well as shooting galleries with open shooting galleries with loop holes – + 18 ° C. Vestibules hot-water skating rinks and ski resorts – + 16 ° C.