How much higher the altitude is harmful to the human body

— 1500-3500 meters is the high altitude, at which most people can adapt if there is enough time;

3500-5500 meters is the ultra-high altitude, at this altitude, individual differences determine whether they can adapt;

Above 5,500 meters is an extremely high altitude, at which the body's functions are severely reduced, and some damage is irreversible. No one can stay at this height for a year. Even Tibetans and Sherpas generally live below 5,500 meters.

From the actual situation, people living at low altitudes generally feel basically normal below 2400 meters above sea level, and there is no obvious reaction; Above 2400 meters, if there is a reasonable elevation ladder and enough time, it can still be gradually adapted; After 5500 meters, no matter how much time it takes, you can't fully adapt.

It can cause altitude sickness.

Symptoms such as headache, dizziness, nausea and vomiting, palpitation, shortness of breath, chest tightness and chest pain, insomnia, drowsiness, loss of appetite, abdominal distention, numbness in the hands and feet, etc., only mild symptoms such as palpitation, shortness of breath, chest tightness, chest pain, etc., are manifested at rest, but the symptoms are particularly significant after activity.

Generally speaking, when plain people quickly enter the plateau above 3000m above sea level, 50% and 75% of people have altitude sickness, but the symptoms gradually disappear after 3 to 10 days of habit.

The incidence of altitude sickness is lower in the elderly than in young people, and in women than in men; The incidence of altitude sickness was positively correlated with the body mass index of men and not with the body mass index of women, indicating that obese men were more susceptible.

Prevent altitude sickness.

1. Slow movement on the plateau.

Pay special attention especially when you have just arrived; Don't overeat, but drink plenty of water.

2. Don't arrange the journey too tightly.

Avoid strenuous activities and heavy physical labor in the first two days, and climb slowly to allow some time for the body to gradually adapt; If you are going to go outdoors or climb mountains, you should usually not go up to 1,000 meters per day.

3. Prepare some commonly used medicines.

Gaoyuanan, Gaoyuankang, Gaoyuanning, acetazolamide, tachylead dust only urine, dexamethasone, etc., are best before entering Tibet.

If you take it in three or four days, or follow the doctor's instructions, you can greatly alleviate altitude sickness after entering Tibet, and these drugs are cheap and sold in ordinary pharmacies.

The above content refers to the Encyclopedia - Aoji Solanogan Reaction.

At an altitude of 2,300 meters, the human body is prone to altitude sickness, which will affect the human respiratory system and cardiovascular system, such as high-altitude heart disease, because of long-term lack of water and oxygen, it is easy to make arteriosclerosis and aggravate the load on the heart.

Patients with acute altitude sickness may experience dizziness, headache, shortness of breath, chest tightness, palpitations, fatigue, nausea and vomiting, sleep disorders, and patients with more severe altitude sickness may also have complications, such as pulmonary edema and cerebral edema, at this time, patients may have dyspnea, severe headache, confusion and other symptoms, and even life-threatening in severe cases.

When altitude sickness occurs, patients should be inhaled oxygen in time, if the symptoms of altitude sickness are mild, after rest and sleep, stop continuing strenuous activities in the plateau area, bed rest and replenish fluids, and at the same time can take low-concentration oxygen through nasal cannula or mask, the patient's altitude sickness can be reduced or disappeared, if the condition is at home in time to go to the local hospital for diagnosis and treatment, to prevent further aggravation of the condition.

Ways to prevent altitude sickness

1. Before going to the plateau, you should do some hypoxic exercises, so that the body can have physiological adjustments to the hypoxic environment.

2. It is necessary to adjust the psychology and mentality, and fully understand the hazards of altitude sickness and emergency measures.

3. The safest and most effective preventive measure is to step up the mountain, and the speed of climbing the mountain every day can not be too fast, from the plain to the plateau of more than 4,000 meters, it is recommended to climb it in three to four days.

4. After arriving at the plateau, do not do heavy physical activity, do not drink alcohol, and do not take sedative sleeping pills, especially in the first two days.

5. Before going to the plateau, oral drugs such as eleutherococcus senticosus, compound Codonopsis or sulpiride can be taken orally to prevent and alleviate the symptoms of acute altitude sickness.

At an altitude of 3,500 meters, mild altitude sickness occurs, such as rapid breathing and heartbeat, fatigue, headache, sleep disturbance, etc. There is a chance of respiratory diseases such as high-altitude pulmonary edema and other high-altitude diseases.

Ordinary people work or live on the plateau, often due to lack of oxygen. According to the survey statistics, the altitude of 3000 meters is the critical height, the human body below 3000 meters above sea level is less likely to have adverse symptoms, the climate characteristics above 3000 meters above sea level are very different from the plain lowland, with the increase in altitude, more than 60% of people will have different degrees of discomfort, hypoxia or disease.

The various symptoms that occur due to the lack of oxygen at altitude are medically known as maladaptive disorder, commonly known as altitude sickness. Each person's adaptability to the plateau is different, and the strength of altitude sickness is also different, some are temporary, as long as they adapt to the plateau environment for a period of time or away from the plateau environment, that is, they will return to normal, and some will last for a long time or the altitude sickness is very strong.

Prepare in advance to go to the high altitude

When going to higher altitudes, try to increase your altitude as slowly as possible. When the altitude rises to about 2,500 meters, it usually takes 3 to 5 days for the human body to acclimatize before it can set off to a higher altitude.

Secondly, it is necessary to pay attention to rest, whether it is domestic travel or overseas travel, it may affect the normal work and rest, which may lead to fatigue and dehydration, and increase the probability of altitude sickness. It's a good idea to take a day or two to get some rest and adjust to your new surroundings and sleeping patterns before heading out to higher altitudes, which is especially important when traveling abroad.

Before setting off for high altitudes, you can prepare some medicines to prevent altitude sickness and check with your doctor.

In medicine, the plateau above 3,000 meters above sea level is called the medical plateau. Plateau scientists define 3,000 meters as the critical altitude at which people react, as "the height that does not harm health". This non-health-harming theme is the altitude reaction of hypoxia, as well as the damage to the human body caused by a series of natural factors such as bottom temperature, strong ultraviolet rays, cosmic particle radiation and low humidity brought about by rising altitude.

Places below 500 meters above sea level have a heavier burden on human body functions due to higher air pressure, higher air density, and more humid heat. Above 2,500 meters, due to the low atmospheric pressure, the oxygen content in the air decreases, which will make it difficult to breathe and cause altitude sickness. The most suitable altitude for human survival is about 500 meters to 2,000 meters.

Altitude sickness is acute altitude sickness, which is a natural physiological reaction produced by the body to adapt to the changes in air pressure difference, low oxygen content, and dry air caused by altitude after reaching a certain altitude, and the altitude generally reaches about 2700 meters. Altitude sickness, also known as altitude sickness, refers to the rapid entry of people without adaptation training into plateau areas above 3000 meters, due to the decrease in the partial pressure of oxygen in the atmosphere, the body's tolerance to the hypoxic environment is reduced, and it is difficult to adapt to cause hypoxia, which causes a series of altitude incompatibility. Altitude sickness is caused by hypoxia, low pressure, and dryness in the plateau environment.

You can eat rhodiola in advance to lay a foundation for your body, and when you go to the plateau, you can carry anti-hyperreflective products such as glucose solution and Omo brand blue tablets, which have a good relieving effect. In severe cases, oxygen or medical attention may be required.

Most of the world's famous longevity areas are concentrated between 1,200 and 1,500 meters above sea level. The results of modern scientific research have revealed the real cause of this mysterious phenomenon: altitude is an important factor affecting human health, because at this altitude, there is the most suitable air pressure for human health, the densest negative oxygen ions, and the most comfortable temperature!

The air pressure caused by altitude directly affects the physiological functions of the human body in all aspects.

According to international physiological and health experimental studies, people living in plain areas for a long time can generally only adapt to the reduction of oxygen pressure 20, and more than this value will cause obvious discomfort. This is because the air pressure is higher below 500 meters above sea level, the air density is higher, and the humidity and heat are relatively high, which has a heavier burden on human body functions; In plateau areas above 2,500 meters, altitude sickness occurs due to low atmospheric pressure and reduced oxygen content in the air, making it difficult for people to breathe. According to physiological and hygiene experimental studies, the altitude that is most beneficial to human health is 1200 meters and 1500 meters.

This is because the normal heartbeat is per minute, and when the altitude reaches 1200 meters, the person's heartbeat will increase to 15%-20%, that is, increase 7-10 times, or even about 15 times, the heart rate is accelerated by low intensity, not only will not have a particularly bad reaction, but will make the human body produce wonderful physiological, physical and chemical reactions: the heartbeat accelerates by 15-20%, which can promote and speed up the body's metabolism, increase the amount of sweating correspondingly, and accelerate fat burning, which naturally plays a role function, very conducive to women's ** body shaping; And the male a.

The function of the glands, adrenal glands, and gonads will be more active, and many physiological functions will be enhanced.

The density and quality of negative oxygen ions are important factors for health and longevity.

Negative oxygen ions are well-known "longevity hormones", which can promote metabolism, strengthen the nervous system, and improve immunity. At an altitude of 1,200 meters, the humidity is moderate, the suspended particulate matter is very small, and most importantly, it is densely distributed"Air vitamins"--Negative oxygen ions, which are very conducive to the health of many physiological indicators such as sleep, lung function, hematopoietic function, etc., promote the health of the brain and the longevity of the body, live here for a long time, and have significant curative effects on asthma, bronchitis, hypertension, migraine and coronary heart disease. In addition, the dense negative oxygen ions can also make people's hair smooth, shiny and elastic, which has an excellent role in promoting women's beauty.

In addition, at this high level, women's heart rate will increase by 15%-20%, and emotional thinking greatly exceeds rational thinking, and it is easy to release the true nature of human beings without restraint, which is ideal for couples.

A romantic paradise.