In Japan and Korea, when you go to a Korean restaurant for dinner in any season, the waiter will bring you ice water, not only in the restaurant, but also at home, usually in iced boiled water. Even if you eat in a restaurant in cold weather, you will be served a glass of cold water, even for the elderly. In fact, there is nothing special, one of which is climate; Another problem is habit, just like we Sichuanese like spicy food and Shanghainese like sweet food, both of which are habits developed from childhood; I think another reason is the atmosphere. In this way, for a long time, because various organs of the body have long been resistant to ice water, there will be no discomfort when drinking.
Who should not drink ice water?
"We Japanese don't have the habit of drinking ice water all the year round, so we can't imitate the drinking methods of Japanese and Koreans at will, otherwise it will cause physical discomfort." The doctor reminded that medically speaking, many people should not drink iced tea. For example, people with acute pharyngitis and bronchitis will aggravate inflammation after being stimulated by cold. People suffering from acute chronic gastroenteritis, drinking cold water will aggravate abdominal pain and diarrhea. People with hepatobiliary diseases, hypertension and coronary heart disease should not eat cold food, otherwise it will promote reflex blood pressure increase and coronary artery spasm.
Doctors believe that children should not drink ice water in cold winter, otherwise it will easily affect the secretion and peristalsis of gastrointestinal digestive glands, causing diarrhea, abdominal pain and not wanting to eat. People with menstrual cramps are also not suitable for drinking cold water, because the strong contraction of blood vessels will cause menstrual blood obstruction and lead to severe abdominal pain.
In addition, it is not advisable to drink ice water and eat cold food after strenuous exercise. When people exercise, due to the consumption of nutrients, they will produce a lot of heat. At this time, the body temperature is higher than usual, sometimes reaching about 39 degrees Celsius. This is a physiological temperature rise, which does no harm to the body itself. When resting after exercise, the heat in the body will gradually dissipate to the outside and the body temperature will gradually return to normal.
If people eat cold food or drink shortly after exercise, the blood vessels in the gastrointestinal tract will contract immediately, which is easy to cause injury and dysfunction.
Matters needing attention in drinking water in winter
Everyone cannot live without water every day. Even if you don't sweat in winter, you should add some water every day. Doctors remind the public to pay attention to the following aspects when drinking water in winter:
1. Drink fresh water. When water is cooled in winter, many people will repeatedly boil water to heat it, which will lead to the increase of nitrite concentration in water. Drinking this water often can cause nitrite poisoning; Scale can also cause digestive, neurological, urinary and hematopoietic diseases, and even premature aging.
Don't boil the water too hot. Generally, 25-30 degrees Celsius is more appropriate, otherwise it will cause harm to the gastric mucosa.
It is best to drink a whole glass of water at one time. Drinking only one or two glasses at a time will quench your thirst and not help your body replenish water.
After the bottled water is opened, it is generally required to be used up within 3 to 5 days. Bottled water that has not been finished after seven days may be stagnant water containing new pollutants. In winter, it is recommended to buy small barrels of bottled water to avoid drinking it all within the shelf life.
At the same time, remember that you can only drink water if you feel thirsty, because thirst is a reaction that the human body loses its water balance and the cells are dehydrated to a certain extent.
The following is a healthy time to drink water: after getting up, the blood is short of water, and drinking water can help the kidneys and liver detoxify; When you get to the office, your body will dehydrate invisibly. When you get to the office, you'd better drink a glass of water first. Drinking water in the morning 10 and around 3 pm can not only replenish water in time, but also help to relax; A certain amount of water about an hour before three meals can ensure the secretion of digestive juice, promote appetite and help digestion and absorption; 1 Drinking a glass of water half an hour before going to bed can reduce the blood concentration and provide water for sleep, but don't drink too much and don't drink it before going to bed.