First of all, drinking more water is good for your health, but it is best to keep warm. Water is the source of life, and we really need to replenish a lot of water to maintain the balance of body fluids, regulate body temperature, and expel nitrogen-containing wastes and other metabolites from the body. Therefore, the idea of drinking more water is correct. According to the recommendation of Dietary Guidelines for China Residents (20 16), adults with mild physical activity should drink at least 1500~ 1700 ml (7-8 cups) of water every day. Under the condition of high temperature or strong physical activity, it should be increased appropriately. It should be noted that drinking too much water will also do harm to human health.
As for the water temperature, China people prefer to be warm, not the hotter the better. Because the delicacy of food is mostly related to temperature, China people have a soft spot for hot food. This can be traced back to 20 thousand years ago. Pottery made by the ancients was used for cooking and boiling water. At the same time, boiling water can also effectively inhibit bacteria. In that era of poor sanitation, the habit of drinking hot water gradually formed. However, modern research believes that drinking water is not as hot as possible. Excessive water temperature will burn the digestive tract mucosa. It is more appropriate to use warm water of 34~38℃, and the water temperature should not exceed 60℃ as far as possible. In addition, many young people are not unable to learn the western habit of drinking cold water and ice water, but our stomach acceptance is not high, which is easy to cause stomach discomfort and induce diseases.
Secondly, can drinking hot water really prevent all diseases? I'm afraid it's just a good wish.
When people are in a state of diseases such as diarrhea, body fluids will decrease and they will feel thirsty easily. Therefore, drinking a cup of warm water can replenish body fluids, which has a certain "warming" effect and relieves muscle and vascular spasm, but it can't relieve the root cause. Taking dysmenorrhea as an example, the fundamental reason lies in the increase of prostaglandin content in endometrial or pelvic organic lesions, and the decrease of estrogen content and pain tolerance in the body. Drinking water can supplement the fluid loss caused by menstruation, but it can't change the hormone level, nor can it alleviate organic diseases. Especially for people with severe dysmenorrhea, drinking hot water can only increase psychological comfort. Even if you drink more hot water, no matter how high the water temperature is, it has little practical significance for relieving dysmenorrhea.
Drinking hot water to prevent colds is not absolute. Drinking plenty of water can help maintain the body's immunity in a normal state, at the same time, it can also reduce the viscosity of respiratory secretions and enhance the ability to block the invasion of pathogens. From the above point of view, drinking more warm water does have a certain effect on preventing colds. But there are many kinds of colds, especially the flu, which is more contagious and pathogenic. It is not enough to drink hot water, but also to improve immunity and cultivate good hygiene habits. Of course, if you catch a cold, drinking more warm water really helps to relieve the symptoms.
It is not reliable to say that drinking hot water can nourish the stomach. Under the influence of China people's eating habits, too cold food, water or cold air enter the stomach, which will cause vasoconstriction under the gastric mucosa, and then lead to spasmodic pain in the stomach. Drinking warm water at this time can really relieve the pain, which also makes many people mistakenly think that drinking hot water can nourish the stomach. In fact, in addition to drinking warm water, you can also drink soup and coffee, or hot compress can also achieve the effect of relieving stomach discomfort. However, if you drink too much water before and after eating, it may cause the digestive juice in your stomach to be diluted and affect your digestive function.
Not to mention the discoloration of ice, ice water generally does not reach the temperature that hurts the stomach. As for why some people are uncomfortable drinking ice water, there may be the following reasons:
1. Sensitive to cold food: Different people have different reactions and tolerance to ice. If you drink ice, you will feel uncomfortable. It may be that the smooth muscle of the digestive tract is relatively more sensitive to temperature, and the cold food you eat makes the gastrointestinal tract cramp.
2. The water source is not clean: if it is not a physical sensitive reason, it is necessary to check whether it is related to the water source. If there are bacteria and parasites in the water, it may cause abdominal pain and diarrhea.
However, although ice water will not harm the stomach, it is no different from hot water, but some people are not suitable for drinking ice water.
1. People with poor gastrointestinal tract, such as people with irritable bowel syndrome, people with poor gastrointestinal digestive function, or people with gastrointestinal diseases. Ice water can stimulate the short-term contraction of stomach blood vessels and intestinal spasm, leading to stomach pain and diarrhea.
2. People with a history of migraine. When these people eat cold food, they will stimulate the oral mucosa, lead to vasoconstriction of the head and face, affect the nerve center and cause headaches.
3. After strenuous exercise, gastrointestinal blood vessels dilate and blood circulation accelerates. At this time, drinking ice water will stimulate the blood vessels and mucosa of the gastrointestinal tract, so that the blood vessels and mucosa of the gastrointestinal tract will contract sharply, leading to gastrointestinal spasm, abdominal pain, bloating, diarrhea and other symptoms. But even if drinking ice water won't hurt your stomach, if you want to maintain your stomach, you should drink warm water, drink less ice water or hot water, and "eat in moderation", control your diet and don't overeat. Many people like to drink ice water after getting up, but it is unscientific to drink such water.
Drinking ice water directly after getting up in the morning can easily lead to the contraction of our gastrointestinal blood vessels, which in turn affects our digestion. In severe cases, there will be gastrointestinal spasm. If you don't pay attention to drinking ice water for a long time, it is easy to cause stomach problems. If you drink ice water on an empty stomach, it will not only affect the stomach, but also stimulate the house, which is easy to cause a cold and cough.
If you want to drink healthy water, these three essentials must be remembered.
1, Drink more warm water Many people like to drink ice water or cold drinks after sweating heavily, which will bring temporary coolness. However, drinking a lot of ice water or cold drinks will lead to poor ventilation of sweat pores, difficulty in heat dissipation, and accumulation of residual heat, which may easily lead to heatstroke. And cold drinks are easy to hurt the spleen and stomach, leading to abdominal pain and diarrhea. Therefore, it is recommended that you drink warm water after sweating or in summer.
2. The normal value of daily water consumption is about 1200- 1500ml. Because the daily intake and intake of water is basically maintained at around 2500ml. Because the daily urine is about 1500ml, and the moisture in the feces is 150ml. Breathing and skin evaporation can take away 350ml and 500ml of water respectively, and add up to about 2500ml of water from the body every day.
3. From the time point of view, proper hydration in the morning can promote gastrointestinal peristalsis, smooth excretion, help dilute blood viscosity, promote blood circulation, and prevent cerebral infarction and myocardial infarction. Drinking water properly for half an hour after meals is helpful for food digestion and absorption. Supplementing water for half an hour after exercise helps to regulate the balance of water and salt in the body. Drink a little water before going to bed at night, and your normal circulation and metabolism can be better guaranteed this night.