1, health misunderstanding in summer
Myth 1 The less you wear, the cooler you are.
In the sultry dog days, there are always people who like to be shirtless, thinking that it is cool, but it is not necessarily so. From a physiological point of view, human body temperature regulation depends not only on skin evaporation, but also on skin radiation. According to the measurement, when the temperature reaches 35℃, the body temperature mainly depends on skin evaporation to dissipate heat. When the temperature continues to rise, the skin can not only radiate heat, but also absorb heat from the external environment. Therefore, if you go shirtless at this time, it is easy to absorb heat. You will feel more sultry, not cool.
Myth 2: The spirit of taking a nap at the desk is better.
It's easy to feel sleepy at noon in summer, but it's actually a bad habit to take a nap at my desk. Most people will have temporary blurred vision after a nap, which is due to the compression of the eyeball, causing corneal deformation and curvature changes. Pressing the eyeball every day will cause high intraocular pressure, which will damage vision in the long run.
Myth 3: Open the doors and windows for cool ventilation.
In hot summer, the outdoor temperature is very high, and sometimes even the wind outside is hot. At this time, opening doors and windows will make the indoor and outdoor temperatures as high. Therefore, if the outdoor temperature is very high in summer, the doors and windows should be closed before the highest temperature 14 to keep the indoor temperature at a low level, and then the doors and windows should be opened at night to make the room cooler.
Myth 4: Drinking ice water and eating ice products can put out the fire.
Many people's happiest memory in summer is drinking ice water when sweating. However, Chinese medicine says that ice water can't quench the thirst of the body, because the body will release more heat energy to balance the body temperature reduced by drinking ice water, so drinking ice water will only produce a temporary cold feeling and some psychological effects, and it can't really alleviate the summer heat.
Eating popsicles is similar to drinking ice water, but the psychological comfort is greater than the real actual effect, so eating ice products should not be too frequent, otherwise it will stimulate the body to generate more heat energy. In summer, you should replenish water and drink warm and cold water, which is lower than your body temperature but does not feel "ice". The temperature is about 10 to 20℃. Pick the right time to eat ice. Don't eat ice on an empty stomach or immediately after exercise.
Myth 5: Eating only fruit can reduce weight.
In summer, some people will take fruit instead of dinner, but just taking the nutrients in fruit is not enough to supplement the five nutrients that the human body needs every day: sugar, lipids, protein, minerals and vitamins. Moreover, many fruits have high sugar content and high glycemic index. After eating them, blood sugar tends to soar, which is not good for people who are afraid of obesity and diabetes.
Myth 6: Drinking beer can relieve summer heat.
When beer is first drunk in your mouth, it does have a cool feeling. However, if you drink one more bottle, it will still make people's throats dry, the whole body will be hot, and thirst and sweating will be worse. Not only will it not achieve the purpose of relieving summer heat, but it will reduce people's thinking ability and work efficiency.
If you drink cold beer, the harm is even greater. The temperature of cold beer is 20-30℃ lower than that of human body. If you drink a lot, the temperature of gastrointestinal tract will drop rapidly and the blood flow will decrease, which will cause physiological dysfunction and affect digestive function. In severe cases, it may even lead to life-threatening emergencies such as spastic abdominal pain, diarrhea and acute pancreatitis.
Myth 7: Taking a cold bath can cool down.
Many people think that taking a bath with cold water can cool down. In fact, taking a cold bath when sweating will make the pores of the whole body close quickly, which will lead to the heat in the body not being distributed in time and staying in the body, which will easily lead to various diseases. The correct way is to take a warm bath, because a warm bath will dissipate heat faster and make people feel refreshed after bathing.
Myth 8: Sweating a lot is good for your health.
On the one hand, sweating in summer can evaporate heat and keep body temperature constant; On the other hand, it can discharge a variety of harmful metabolic wastes, such as lactic acid, carbonic acid and bacterial toxins. But sweating is not good, because sweating will lose a lot of useful substances, resulting in insufficient potassium and sodium in the body. Sweat also contains trace elements such as zinc, copper and iodine. Excessive sweating can lead to dehydration and weakness.
In addition, a lot of sweating can concentrate blood and increase blood viscosity, which is dangerous for thrombosis and myocardial infarction induced by arteriosclerosis. Therefore, when you sweat a lot in hot summer, you should always replenish water and salt. Drink vegetable soup for three meals on weekdays and eat fruits and vegetables rich in water, vitamins and potassium salts, such as watermelon, cucumber, spinach and loofah.
Myth 9: The earlier you do morning exercises in summer, the better.
According to experts' research, air pollutants are the most difficult to diffuse before 6 am in summer, which is often the peak period of pollution. People generally like to do morning exercises in places with green plants such as lawns. Before sunrise, because there was no photosynthesis, there was not much fresh oxygen near the green plants, but a lot of carbon dioxide was accumulated, which was obviously unfavorable to human health. Therefore, the time for morning exercise in summer should not be earlier than 6 o'clock.
Myth 10 The darker the sunglasses, the more eye-protecting.
If the color of the lens is too dark, not only can it not protect the eyes, but it will seriously affect the visibility, causing the eyes to be easily damaged because of the difficulty in seeing, and it will not protect the eyes. Experts suggest that when choosing sunglasses, dark gray is generally better, which not only can resist ultraviolet rays, but also has the best visual clarity and minimal color change to external objects. Dark brown and black are the second, and blue and purple are the worst, because these two lenses will transmit more ultraviolet rays. Try not to use yellow, orange and light red.
2. What kind of fruit is good to eat in summer?
1, watermelon
Watermelon is a kind of fruit that ripens in summer. But with the continuous development of people's planting and storage technology, watermelons can be eaten even in winter. However, watermelon has the effect of clearing away heat and relieving summer heat, and is cold in nature, which is more suitable for eating in summer.
Watermelon is not only full of water, but also has high nutritional value. We judge whether watermelon is delicious or not mainly by its sweetness. Fruit contains more sugar and potassium, which can play a diuretic and anti-inflammatory role and is very beneficial to patients with nephritis.
Watermelon contains a variety of amino acids, vitamins, minerals and other nutrients, which can not only supplement the body nutrition, but also whiten the skin. Don't throw away the remaining watermelon skin even if you eat it. Massage the face with it, which can calm, relieve, remove spots and replenish water, especially beneficial to sunburned skin.
A foreign study shows that people with hypertension and heart disease can lower their blood pressure and relieve their heart discomfort by eating more watermelon. Moreover, this result is not seasonal. Then, while a large number of watermelons are on the market this season, you might as well eat more. As long as the blood sugar is well controlled, you can eat some in other seasons.
2.peach trees
Peaches are also seasonal fruits in summer. They have always been symbols of longevity and good luck. When the elderly celebrate their birthdays, people often prepare peaches as "birthday peaches". Moreover, peaches are also made into canned and other delicious foods, which are widely welcomed by people.
Eating more peaches in summer can replenish qi and blood and improve the symptoms of facial yellowing. Moreover, peaches contain more minerals such as iron, potassium, calcium and phosphorus, as well as vitamin B and vitamin C, which can nourish yin and moisten the lungs, and also have a certain auxiliary effect on patients with bronchitis and tuberculosis.
Not only peach flesh, but also peach kernel has a certain nourishing effect, which can relieve cough, lower blood pressure, relax bowels, promote blood circulation and remove blood stasis. Therefore, eating peaches often is very healthy. But don't eat too much at once.
Eating too many peaches is easy to get angry and cause bloating. People with diabetes should eat less peaches to prevent blood sugar from rising continuously.
3. Cherry
Now cherries are sold everywhere in the streets. Cherry is not only "high value", but also very popular and has high nutritional value.
Although both watermelons and peaches contain iron, they are not as good as cherries in terms of content. The iron content of cherries ranks first among all fruits. Therefore, to prevent iron deficiency, you can eat more cherries, which can not only enhance your physical fitness, but also strengthen your brain and improve your intelligence.
Eating too many peaches is easy to get angry and cause bloating. People with diabetes should eat less peaches to prevent blood sugar from rising continuously.
3. Cherry
Now cherries are sold everywhere in the streets. Cherry is not only "high value", but also very popular and has high nutritional value.
Although both watermelons and peaches contain iron, they are not as good as cherries in terms of content. The iron content of cherries ranks first among all fruits. Therefore, to prevent iron deficiency, you can eat more cherries, which can not only enhance your physical fitness, but also strengthen your brain and improve your intelligence.
4.pitaya
Pitaya is also a large number of fruits listed in summer. Although its taste may not be as good as the above, its efficacy is not bad at all.
Pitaya contains more anthocyanins and has obvious antioxidant effect. It can not only prevent arteriosclerosis, reduce the risk of cardiovascular and cerebrovascular diseases, but also resist free radicals and prevent cancer.
Moreover, pitaya also contains plant albumin, which is a rare substance in general fruits and vegetables. It can combine with heavy metals in the human body and be excreted, thus playing the role of detoxification.
In addition, eating pitaya regularly can also prevent constipation and anemia, increase bone density and whiten skin. It can be said that it is a healthy fruit suitable for everyone to eat.
5. Loquat
Our impression of loquat probably stays in moistening the lungs and relieving cough. Indeed, loquat contains amygdalin, which is also the main component of cough syrup.
However, the effect of loquat does not stop there. Vitamin B 17 can help eliminate free radicals in our body and has a certain preventive effect. Vitamin A can prevent myopia, astigmatism and night blindness, so loquat has a good eye protection effect.
The acidic substances contained in loquat can stimulate the secretion of gastric juice, so it has the effects of appetizing, strengthening the spleen and helping digestion. It can also improve patients who often have dry mouth, bitter taste and bad breath.