Water hardening
Water procedures are considered a powerful tool for thermoregulation. Cooling should be gradual: the temperature is lowered to 15 °C and below, and the total duration (including wiping) should not exceed 3–4 minutes.
- Shower. Combines the thermal and mechanical effects of the water jet, causing a strong response. Start at 30–32 °C (up to 1 minute), gradually lowering the temperature and increasing the time. Contrast showers are suitable for well-hardened individuals (alternating 35–40 °C and 15–20 °C, 2–3 times over 3 minutes). Signs of a correct reaction are vigor and a good appetite; overdosage manifests as irritability and insomnia.
- Swimming in open water bodies. A complex method combining the thermal impact of water, the influence of air, sun, and physical activity. The season begins when the water and air temperature reach 18–20 °C, and ends at 14–15 °C (water) and 16–17 °C (air). Swimming starts at 4–5 minutes, working up to 15–20 minutes.
- Sea bathing. Provides an additional chemical effect of salts (predominantly sodium chloride), which remain in the skin pores, maintaining mild hyperemia.
Caution: Entering the water is strictly prohibited in a state of severe agitation, overheating, or chills. Winter swimming is considered an extreme procedure and is not recommended for the majority.
Sun hardening
Air-sun baths promote adaptation to high temperatures and have a general health-improving effect. They should be taken in the morning hours (sunbathing is strictly prohibited from 10:00 to 14:00 in southern and middle latitudes).
During the session, it is necessary to:
- Lie with your feet toward the sun and regularly change body position.
- Protect the head (hat, umbrella) and eyes (dark or yellow-green glasses).
- Take breaks in the shade for 10–15 minutes every hour.
- Avoid profuse sweating and do not sleep.
Water procedures are taken after the session. Swimming during sunbathing is only permitted for healthy individuals in the later stages of the course (wet skin is extremely sensitive to UV rays, high risk of sunburn).
Sunbath dosing
Rational dosing is the key to safe adaptation to UV radiation.
- Minute method (for healthy individuals). Starts with 5–10 minutes, adding 5–10 minutes daily. Maximum duration is 2–3 hours per day.
- Caloric method according to Mezernitsky (for debilitated individuals, used in sanatoriums). Based on counting thermal calories. One biological dose equals 5 calories. The course starts with 1 dose, reaching 50–80 (for patients) or 100–120 calories (for healthy individuals) per day. An actinometer is used for control.
UV hazards and skin phototypes
The degree of pigmentation is not an indicator of the procedure's benefit; it depends on the skin phototype:
- Type I (redheads): burns only, no tan.
- Type II (blondes): prone to sunburn, but pigmentation is possible.
- Type III (brunettes/brown-haired): good tan.
- Type IV (dark-haired/brunettes): easy and rapid tan.
Individuals with types I–III need to use high-SPF sunscreens to avoid burns and melanoma. Excess UV rays penetrate deeply into the skin, causing DNA mutations and the appearance of atypical cells that can trigger a tumor process many years later.
Briefly: answers to topical questions
What are the main principles of body hardening distinguished in hygiene?
The source cites the following principles of body hardening:
- Gradual increase in stimulus strength — adaptation should proceed smoothly.
- Systematic approach — procedures must be performed daily to consolidate trace reactions.
- Proper dosage — the leading factor determining the effect is the strength of the stimulus, not the duration of its exposure.
- Complex use of hardening agents.
The fifth principle in the cited source fragment cuts off at the word "Uche".
What medical contraindications exist for water hardening procedures?
Absolute contraindications for entering the water when swimming in open bodies of water are:
- Excited state;
- Overheated state;
- State of chills.
Winter swimming is considered a very strong cold stimulus procedure and is not recommended for the overwhelming majority of people.
What types of air hardening (aerotherapy) and their temperature regimens exist?
Air hardening (aerotherapy) is carried out in the form of air baths, which are divided into three types depending on temperature.
- Warm — conducted at air temperatures from 30 to 20 °C.
- Cool — the temperature range is from 20 to 14 °C.
- Cold — carried out at temperatures below 14 °C.
The main dosing factor is temperature, although humidity and air movement speed are also taken into account.
What Fitzpatrick skin phototypes are distinguished in dermatology and hygiene?
Dermatology distinguishes four main skin phototypes based on tanning ability (mention of the specific Fitzpatrick classification is absent in the sources).
- Type I — redheads with freckles, completely prone to no tanning and only getting burns.
- Type II — blondes, prone to burns but form pigmentation.
- Type III — brown-haired individuals, tan quite well.
- Type IV — dark-skinned brunettes, tan easily and very well.
Most of the population of the Russian Federation has I–III ("light") phototypes.
What methods and devices are used to measure the intensity of ultraviolet radiation?
For dosing solar radiation, the following are used:
- Actinometer — to measure solar radiation intensity;
- Special tables — to calculate the time required to receive one biological dose;
- Sound signaling — to record the completion of each dose intake.
One biological dose of solar radiation is 5 calories.
Class and exam questions
Why is it forbidden to swim while sunbathing during the initial stage of hardening?
Moisture on the skin's surface significantly increases its sensitivity to ultraviolet rays, which exponentially increases the risk of sunburn.
How to know if water procedures have been chosen correctly?
With an adequate load, a person feels vigorous, fresh, and experiences improved appetite and working capacity. Irritability or insomnia indicate an overdose.
What is the special feature of the caloric dosage method?
It is more accurate because it accounts for the actual amount of received solar energy (measured in calories), which depends on weather and geographical latitude.
What else to study on this topic
- Sanitary and epidemiological requirements for artificial swimming pools
- Organization and requirements for solariums
- Symptoms of intolerance to air and sun baths and management upon their appearance
- Methods for preventing ultraviolet starvation in the workplace (photariums)
- Role and classification of physical exercises in a healthy lifestyle
Master the entire topic in the "Hygiene" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on "Body Hardening" and another 530 pages of the subject
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 95 video lessons for the subject
Other topics in "Chapter 9. Personal Hygiene and Healthy Lifestyle"
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.