Why do people tend to feel irritable after the summer solstice? What are the special phenomena of the summer solstice?

Summer solstice is the day with the longest day and shortest night in a year. The Tang Dynasty poet Wei Yingwu also wrote in his poem "Summer Solstice Beichi" that "the sundial has reached its utmost, and the night clock has become longer since then". Due to the sudden rise in temperature, the emotional conditioning center of the hypothalamus of the human body will be affected by the temperature and cause the human body to have an anxious reaction. At this time, we should adjust our mood and drink more water, but we must also have principles!

Contents of this article

1. Why do we tend to feel irritable after the summer solstice?

2. What are the special phenomena of the summer solstice?

3. Principles of drinking water during the summer solstice

Why do we get irritable after the summer solstice?

Due to the sudden rise in temperature, the emotional conditioning center of the hypothalamus of the human body will be affected by the temperature and cause the human body to have an anxious reaction. Some people may not be in a very hot environment, but they may also have irritable emotions due to the strong light outside the window. In addition, emotions may also be related to factors such as increased sweat excretion, insufficient sleep and diet, all of which may affect the body's electrolyte metabolism and the brain's neural function, thereby further affecting people's emotions and actions. Therefore, be careful of emotional "heatstroke" in midsummer.

What are the special phenomena of the summer solstice?

The day with the longest day and shortest night in the year.

On the summer solstice, the sun reaches the northernmost point of the year, almost directly above the Tropic of Cancer (23°26' north latitude), making it the longest day of the year in the northern hemisphere. The longer the day, the longer it is the further north you go. For example, the day in Haikou, Hainan, is a little over 13 hours long, in Hangzhou it's 14 hours, in Beijing it's about 15 hours, and in Mohe, Heilongjiang it's more than 17 hours.

After the summer solstice, the sun's direct point begins to move southward, the days in the northern hemisphere begin to gradually shorten, and the sun's altitude at noon in areas north of the Tropic of Cancer also begins to decrease day by day. There is a saying among the people that "after eating summer solstice noodles, the day becomes one line shorter."

The Tang Dynasty poet Wei Yingwu also wrote in his poem "Summer Solstice Summer Vacation in the North Pond" that "the sundial has reached its utmost, and the night clock has grown longer from now on." At this time, it was midwinter in the southern hemisphere.

Principles of drinking water during the summer solstice

First, the temperature of drinking water should be appropriate. It is best to control the water temperature between 8℃ and 14℃, because water at this temperature can pass through the stomach quickly.

Second, drink some water before exercise. You can drink 150-200 ml of water within 10-15 minutes before exercise.

Third, drink a little water frequently. It is best to drink water every 20 to 30 minutes during exercise, and drink 150 to 200 ml each time.

Fourth, replenish light salt water. If you lose a lot of water and salt after exercise, you can drink some light salt water, or add a little more salt to the soup when eating.