Characteristics of first frost solar terms and first frost solar terms

At the beginning of frost, the weather turns cold and dew condenses into frost. The temperature difference between morning and evening increases, so people should pay special attention to the warmth of waist and legs besides adding clothes in time; Cold pathogen and dryness pathogen are easy to cause the attack or aggravation of diseases such as cough and asthma and arthralgia syndrome, so it is necessary to strengthen prevention; In diet, it is advisable to take supplements and eat more foods such as persimmons, chestnuts, radishes, pears and onions.

Solar term characteristics of first frost

The first frost is the last solar term in autumn, and the annual Gregorian calendar1October 23-24 is 10, and the sun starts at 2 10 of the yellow meridian. "Twenty-four solar terms" said: "In mid-September, the gas is cold and condensed, and the frost is exposed." "First frost" means that the weather is getting colder and the dew condenses into frost.

There is a lot of heat dissipation on the ground in autumn nights. When the temperature suddenly drops below 0℃, the water vapor in the air directly condenses on the ground or plants to form tiny ice needles, and some become hexagonal frost flowers with white color and loose structure. This white crystal is "frost". Generally speaking, the better the sunshine during the day, the higher the temperature, and the more frosting at night, so the temperature difference between morning and evening of the first frost is greater. Frost can only form on sunny days. People say that "the thick frost is fierce" is the reason.

In ancient China, the first frost was divided into three stages:

"The jackal is a sacrificial beast; Second, the vegetation is yellow; Three waiting insects are salty. "

This means that in the solar term of the first frost, the jackal will show his prey first and then eat it; The leaves on the earth turned yellow and fell; The stinging insects are motionless in the cave, drooping their heads and going into hibernation.

"The first frost in the first frost" reflects the climate characteristics of the Yellow River Basin. As far as the annual frost days are concerned, there are frost and snow in some parts of the Qinghai-Tibet Plateau even in summer, and the annual frost days are over 200, which is the place with the largest number of frost days in China. The first frost in all parts of China is gradually delayed from north to south and from mountainous areas to plains.

Except for areas with frost all the year round, frost first appeared in the north of Daxing 'anling, usually at the end of August. The first frost in most parts of Northeast China, Inner Mongolia and Northern Xinjiang is mostly in September. 10 Frost has appeared in Shenyang, Chengde, Yulin, Qamdo and Lhasa. 165438+1Frost can also be seen in Shandong Peninsula, Zhengzhou and Xi 'an to northwest Yunnan in early October; Frost did not appear in eastern China, Hanshui and Yunnan provinces until the beginning of 65438+February. When first frost went from Xiamen and Guangzhou to Baise and Simao, it was the beginning of October after 65438+ years.

How to maintain health in the first frost?

Live a healthy life

The temperature difference between day and night of the first frost increases, so people should do a good job of keeping warm. In addition to adding clothes in time, we should pay special attention to the warmth of our waist and legs. Because the waist of the human body supports the whole upper body and bears half the weight of the body, it is not only one of the most complicated and active parts, but also the most vulnerable part when carrying weight or exercising.

During the first frost, the temperature dropped obviously, and pathogenic wind, cold and dampness invaded the waist, resulting in obstruction of the waist meridians, poor qi and blood, backache and backache. The knee joint of the leg is also one of the parts vulnerable to cold evil. What we usually call "old cold legs" is closely related to feeling cold evil. Because the first frost weather is getting colder and colder, the elderly are prone to this disease. Because the knee joint is the largest joint in the human body, it bears almost the weight of the whole body, with heavy burden and large activity, and the articular cartilage is easy to wear and tear.

With the continuous expansion of arteriosclerosis plaque and secondary thrombosis of lower limbs in the elderly, blood vessels are increasingly narrow, blood flow slows down and blood flow decreases. When the vascular stenosis reaches a certain degree, even the lumen is blocked, the blood supplied to the lower limbs can not meet the needs of the human body. When the weather is cold, it is easy to cause nerve, blood vessel and soft tissue dysfunction of knee joint due to cold, humidity and other factors, thus aggravating the condition. Therefore, after the first frost, people should add clothes in time according to the weather changes, especially pay attention to the warmth of the waist and legs.

Before and after the first frost of solar terms, respiratory diseases, mainly chronic bronchitis, will attack or worsen. Therefore, people should pay attention to the prevention of respiratory diseases and try to go to places where there are many people and the air is not circulating. Middle-aged and elderly people should wear gloves for morning exercises, and it is best for the weak to wear masks; Go out later when the temperature drops sharply in the morning.

have a healthy diet

The first frost should be supplemented in the solar term diet. There is a folk proverb that "it is better to make up the first frost than the winter", which emphasizes the importance of making up the first frost. The theory of TCM health preservation puts forward "four seasons and five supplements";

Spring should be replenished, summer should be replenished, long summer should be replenished lightly, autumn should be replenished flatly, and winter should be warmed up.

Su Wen on the Method of Dirty Qi says: "The lung governs autumn, and the lung wants to harvest it. It is urgent to eat acid to harvest it, supplement it with acid, and pungent to diarrhea it." It can be seen that sour taste converges lung qi, pungent taste diverges and clears lung, and it should be collected in autumn instead of scattered. Therefore, we should eat less spicy food, such as ginger, onion, garlic, pepper and so on. , especially spicy hot pot and barbecue foods to prevent "getting angry"; Eat more apples, pomegranates, grapes, mangoes, carambola, sleeves, lemons, hawthorn and so on. In addition, the first frost is also suitable for eating persimmons, chestnuts, radishes, pears, onions and so on.

In some places, there is a custom of eating persimmons in the first frost, saying that "eating persimmons in the first frost keeps you from catching a cold in winter". Persimmons generally mature completely before and after the first frost. At this time, the persimmon is thin and fresh, delicious and has high nutritional value. Persimmons are sweet, astringent and cold. It has the effects of clearing away heat and moistening dryness, moistening lung and resolving phlegm, quenching thirst, promoting fluid production, softening and strengthening spleen, and stopping bleeding, and can relieve constipation, hemorrhoid pain or bleeding, dry cough, sore throat and hypertension. Therefore, persimmon is an ideal health care product for patients with chronic bronchitis, hypertension and hemorrhoids.

Chestnuts are sweet and warm, and have the effects of nourishing the stomach and strengthening the spleen, tonifying the kidney and strengthening tendons, promoting blood circulation and stopping bleeding, relieving cough and resolving phlegm, which is a good tonic for the first cream. Eating chestnuts can prevent and treat soreness of waist and knees caused by kidney deficiency, unfavorable waist and legs caused by deficiency of spleen and stomach, increased urination and chronic diarrhea; Can improve human immunity and enhance cold resistance.

After the first frost solar terms, the taste of radish becomes delicious. There is an agricultural proverb in Shandong that says:

Xiagaoliang, Bailu Valley, First Frosted Radish.

Radish has the effects of regulating qi, regulating middle energizer, promoting fluid production and removing toxic substances, resolving food stagnation, widening chest and diaphragm, resolving phlegm and clearing heat, removing blood stasis and resolving hard mass. It can be used for treating dyspepsia, phlegm cough, aphonia, hematemesis, hematemesis, thirst quenching, sore throat, dysentery, headache, etc. The first cream is also a good health care product.

Exercise health

The first frost exercise can be increased appropriately, but the warm-up activities should be paid attention to before exercise to avoid damaging the joints. In addition to routine warm-up activities before exercise, the range of motion of each joint should be increased. The necessary warm-up activities are ankle exercise, knee exercise and hip exercise. For example, before playing ball, in addition to jogging, we should focus on exercising our wrists and ankles after running, and exercise first and then exercise.

When some old people are doing sports, they often sway their knees from side to side in a semi-squatting position, which is not desirable. Because the pressure on the patella surface is the highest when squatting, shaking will aggravate the wear and tear, leading to the occurrence of knee osteoarthritis.

Early frost can also practice "sitting in mid-September" to prevent low back and leg pain. The specific method is:

Sit flat on the ground or bed in the morning, stretch your hand and climb your feet. With the force of your feet, stretch your legs and then take them back. Do this 36 times, then knock your teeth 36 times, adjust your breathing and exhale, and swallow body fluid into your abdomen 9 times.

This exercise can prevent and treat wind-cold-dampness arthralgia, lumbago and leg pain, etc.