"Sanjiu" is between the nineteenth and twenty-seventh days after the winter solstice. "Three-nine-four-nine walking on ice", one sentence sums up the cold during this time.
Why do people say these days are the coldest times?What parts of the body can't withstand freezing?What are the key points of health care in 39 days?
On January 9th, it officially entered Sanjiu, and "Life Times" invited experts to tell you how to successfully survive the cold days of Shujiu.
Experts interviewed
Li Xiaojun, professor of the School of Traditional Chinese Medicine, Beijing University of Chinese Medicine.
Why is it the coldest day in Sanjiu
It is generally believed that "Sanjiu" is the coldest days.
Climatically
At this time, the Northeast is generally around minus 20 degrees, which is exactly the same as the phrase "walking on ice". And East China, Southwest China and other regions are also very cold, and it is said that it is this time when it is wet and cold.
From an astronomical point of view
The winter solstice is the day of the shortest sunshine time, the surface heat is naturally less, although the sun altitude angle will gradually increase after the winter solstice, but the amplitude is very small, before the arrival of spring, the duration of sunshine is not enough to dissipate heat at night, the weather will be colder and colder.
The condition of the sun at the point of the winter solstice
Some people wonder why, according to the above statement, is it not the coldest time when the night is the longest on the day of the winter solstice?
This is because, before the winter solstice, the solar altitude angle gradually decreases from large to small, and the heat of the sun changes from more to less, and the heat of the previous day is higher than the heat of the next day, and until the winter solstice, the heat may be enough to dissipate heat at night.
After the winter solstice, the altitude angle of the sun changes from small to large, which means that the heat of the previous day is insufficient, and it is not until the sunshine hours are long enough and the heat is sufficient, we will feel warm, otherwise we will feel colder and colder.
However, China's vast territory and cold in Sanjiu are not a one-size-fits-all law. In some places, it may be colder on the "49th" day, and in addition, South China may not be cold at all, and the temperature may even exceed 20.
When the weather is cold, the 8 major organs are prone to accidents
On nine cold days, those who are afraid of the cold have already prepared down jackets, scarves, hats and other cold weapons. In fact, in addition to the exposed parts, some invisible organs are also tormented and need to be kept warm.
Blood vessels
Cold stimulation causes the contractility of the heart to increase, and the peripheral blood vessels to constrict, resulting in an increase in systolic and diastolic blood pressure, which can easily lead to cerebral hemorrhage and cerebral infarction.
Warmth Strategy:
Avoid vasoconstriction, slow blood flow, and increased viscosity;Eat some blood vessel scavengers: Hawthorn, oats, black fungus, kumquats, eggplants, sweet potatoes, garlic, onions and other foods can help blood vessels unblock.
Dirty heart
The large temperature difference between indoor and outdoor causes an increase in cardiac workload, which in severe cases leads to rupture of atherosclerotic plaques and blockage of blood vessels, resulting in angina pectoris or myocardial infarction.
Warmth Strategy:
Take care of your head, hands and feet when you go out, and wear gloves, hats, and scarvesSoak your feet in hot water before going to bed and get dressed when you wake up at nightPut hot water before taking a bath, and wait for the water temperature to be suitable before taking it.
Lungs
The cold, dry air enters the body through the lungs, which can easily cause coughing, chest tightness, and even asthma and difficulty breathing. If it is not protected at this time, it will induce respiratory diseases and easily fall into the root of the disease.
Warmth Strategy:
When the temperature is low, it is better for people with weak constitution to go out less;Wear a mask when traveling, and pay attention to keeping your head, chest and back and feet warm.
Gastrointestinal
When the weather is cold, the stomach will also be a little tired, and eating too cold, too raw, and too hard food will bring additional burden to the stomach. Wearing too little clothing may cause stomach muscles and blood vessels to constrict, causing stomach cramps.
Warmth Strategy:
Eat plenty of soft, easy-to-digest foods;Eat small, frequent meals and do not eat within 3 hours before bedtime, so that the stomach can combine work and rest.
Nose
In winter, when the nasal mucosa is directly exposed to cold air, its mucus secretion decreases, the capillaries become brittle, and the "screen" effect is also easy to deteriorate, resulting in the air with germs directly entering the lungs and increasing the chance of respiratory tract infection.
Warmth Strategy:
Wash your nasal passages with lukewarm light salt water before bedtime;Wear a mask when air quality is poor, or when going out indoors with high temperatures.
Massage the alar of the nose frequently, rubbing the outside of the thumb of both hands against each other, and when there is a feeling of heat, use the outside of the thumb to massage up and down along the bridge of the nose and both sides of the nose about 30 times.
Close
Low temperatures, constriction of blood vessels, poor flexibility of muscles and ligaments, weakened protection of joints, may cause joint injuries and fractures.
Warmth Strategy:
Middle-aged and elderly people should reduce going out and wear shoes with non-slip solesOutdoor workouts avoid icy roads, and indoor workouts warm up sufficientlyEat more foods rich in vitamin D and calcium to enhance bone resilience.
Ear flowers
Except for the part of the earlobe, which has adipose tissue that can keep warm, the rest of the part only has a thinner ** wrapped in cartilage, which is prone to frostbite, and is the most "cold-sensitive" organ in the five senses.
Warmth Strategy:
Use earmuffs when you go out, or cover your ears with a wide hat or scarfGo indoors from outside and rub your ears with your hands to warm them up;Hot water should not be applied to the ears after being frozen, so as not to aggravate the symptoms.
Prostate
When cold, it is easy to have symptoms such as frequent urination, urgency, painful urination, incomplete urination, urinary weakness, and pain and discomfort in the lower abdomen.
Warmth Strategy:
When taking the bus or subway, you must not sit on the bench;Drink plenty of water and don't hold your urine;Massage the abdomen frequently to feel a slight warmth.
Eat foods that are good for the prostate, such as melon seeds, tomatoes, apples, etc.
The 5 keys to health in 39 days
Traditional Chinese medicine believes that the number of nine cold days is the turning point of the year when yin energy is extremely strong and yang energy begins, and Li Xiaojun, a professor at the School of Traditional Chinese Medicine of Beijing University of Chinese Medicine, once summarized the five key points of health preservation in the coldest season in an interview.
Eat warmly
Warm foods such as mutton, beef, chicken, etc., can help keep the body coldBlack foods such as black sesame seeds, black fungus, and black beans are the first choice for kidney nourishment in winter.
Sleep early
In order to adapt to the winter storage, people should pay attention to going to bed early and getting up late to ensure sufficient sleep timeIn the morning, you may want to lie in bed for a few minutes and stretch, or sit on the head of the bed for three to five minutes before getting up.
Move slowly
Regular exercise can promote blood circulation and increase body heat, in the winter season, exercise should be moderate, just sweat slightly, it is recommended to choose some soothing exercises, such as jogging, shuttlecock kicking, boxing, walking, etc.
The head should be warm
At minus 10, 4 heat "escapes" from the head. When you go out in a cold weather, wear a hat with good warmth, preferably made of wool, woolen and other materials.
The heart should be peaceful
Pay attention to actively adjust your mentality, control your mood and anger, listen more, and participate in recreational activities. It is also necessary to bask in the sun more, accept "photosynthesis", and wait for the spring color after the cold. ▲