Is drinking more water good for your health in hot weather?

The principle of drinking water correctly Many people often think of drinking water when they are thirsty, and they often gulp it down, which is also wrong. Drinking water too fast and too hard is bound to swallow a lot of air together, which is easy to cause hiccups or bloating. Therefore, it is best to put water in your mouth first, and then drink it slowly, especially for people with weak stomach and intestines. Don't drink water when you are thirsty. Drink water in moderation between meals, preferably once every hour. People can also judge whether they need to drink water according to the color of urine. Generally speaking, human urine is light yellow. If the color is too light, maybe they drink too much water. If the color is too dark, it means that they need to add more water. Drinking less before going to bed and drinking more before going to bed is also the principle of drinking water correctly, because drinking too much before going to bed will cause eyelid edema, and running to the toilet in a nightclub will make the quality of sleep not high. After a night's sleep, the body loses about 450 ml of water, which needs to be replenished in time in the morning. Therefore, drinking a glass of water on an empty stomach after getting up in the morning is beneficial to blood circulation, and it can also promote brain lucidity and make the thinking of this day clear and agile. Drink more boiled water instead of raw water. Boiling water for 3 minutes can evaporate chlorine and some harmful substances in the water, and at the same time, it can keep the necessary nutrients in the water. Drinking raw water is very harmful, because chlorine in tap water will interact with residual organic matter in boiling water, which will increase the chances of bladder cancer and rectal cancer. Drink fresh boiled water, not water that has been left for too long. Fresh boiled water is not only sterile, but also contains more than a dozen minerals needed by the human body. But if the time is too long, or if you drink the boiled water in the automatic water heater overnight, not only will you lose all kinds of minerals, but you will also contain some harmful substances, such as nitrite. The resulting nitrite poisoning is not uncommon. Boiled water is the best drink. Boiled water contains no calories and can be directly absorbed and utilized by the human body without digestion. It is generally recommended to drink warm water below 30 degrees Celsius, which will not stimulate the peristalsis of the gastrointestinal tract too much and will not easily cause vasoconstriction. Improper drinking water can lead to "poisoning" and "water poisoning", which means that if you drink too much water for a long time or in a short time, your body must excrete excess water through urine and sweat. However, with the discharge of water, the sodium-based electrolyte in your body will be diluted, the salt in your blood will be less and less, and the water absorption capacity will be reduced. Some water will be quickly absorbed into tissues and cells, causing cell edema. At first, there will be symptoms such as dizziness, weakness and rapid heartbeat. In severe cases, there will even be convulsions, confusion and coma. Therefore, it is dangerous for some girls to drink too much water to lose weight. Replenishing water varies from person to person. In addition to thirst, healthy people also pay attention to when to replenish water by urine color: the normal urine color should be light yellow, if the color is too dark, it must be replenished more; If the color is light, there may be too much water. Drinking more water can stimulate intestinal peristalsis and soften stools, so people with constipation should pay special attention to absorb enough water. Drinking plenty of water when you have a cold and fever can promote body heat dissipation and help patients recover. People who exercise a lot also need to increase the amount of water. Patients with cystitis often control drinking water because of poor urination, which is actually unwise. Such patients should drink more water than usual, which will increase urine volume and increase the role of washing and circulation. Water has diuretic effect, which can make ureter and bladder unobstructed and prevent stones and bacterial infection. Drinking too much water will increase the burden on the heart and kidneys. People with heart disease, kidney and liver problems are not suitable for drinking more water. Water consumption should be controlled according to the doctor's advice. Boil water for 3 minutes. Scientists have confirmed that tap water contains 13 potentially carcinogenic, teratogenic and mutagenic chlorides (such as halogenated hydrocarbons and chloroform). The content of these toxic substances in water is closely related to the water temperature: at 90℃, the content of halogenated hydrocarbons increased from 53 μ g/L at room temperature to 19 1 μ g, and chloroform increased from 43.8 μ g to 177 μ g; When the temperature reached 100℃, the contents of them decreased to 1 10 μ g and 99 μ g respectively. If you continue to boil for 3 minutes, it will drop to 9.2 micrograms and 8.3 micrograms. At this time, the boiled water can be called drinking water that meets the hygienic standards. Scientific experiments also prove that the nitrite content increases very slowly after the water is boiled for 1 ~ 3 minutes; Boiling for more than 5 minutes, its content will increase sharply; If you continue to cook until 10 minutes, this harmful substance will multiply. Therefore, when tap water is boiled for 3 ~ 5 minutes, the content of harmful substances such as nitrite and chloride is the lowest, which is most suitable for people to drink. The four best times to drink water are the first time: just getting up in the morning, which is a state of insufficient qi and blood. The second time: around 8: 00 am 8:00- 10/0, it can replenish the water lost during working hours. The third time: around 3 pm, it is time for tea. The fourth time: before going to bed, the blood concentration will increase when sleeping. If you drink enough water before going to bed, it will dilute the backlog and dilate blood vessels, which is good for your health.