It is called: sunrise and rest, sunset and rest.
When the ancients did not have candles, electric lights and other lighting tools, they often had the sun falling on the mountain, which was basically the rhythm of sleep.
Despite the rapid development of modern technology today, many of the physiological functions of humans, animals and plants are closely related to the natural phenomena that continue to occur in this cycle.
Because of this, people's work and rest are regular, and their biological clocks are naturally formed and inherited for a long time.
"Sleeping in the dark" is a life routine, and if this routine is broken, the human body will feel uncomfortable and dysfunctional.
Turn on the lights when you sleep, is it good?
As early as June 2019, the National Institutes of Health published a large-scale study of 43,222 women.
The researchers followed up the women's height, weight, waistline, hip circumference, and body mass index (BMI) for 5 years to study women's exposure to artificial light sources during sleep, obesity, and weight gain.
The data showed that women who slept without touching artificial light sources gained 5 kg or more of weight and increased their BMI by 10% or more compared to not touching artificial light sources when sleeping.
Simply put, turning on the lights while sleeping can lead to obesity in women.
Why does it cause obesity?
The researchers further analyzed and found that sleeping with artificial light such as lights and TV lights at night disturbed the body's metabolism.
At the same time, sleeping with the light on will also affect the control of blood sugar, blood sugar will rise, especially some people with high blood sugar and diabetes, which is not conducive to the stability of the body, disturbing the secretion of insulin in the body, resulting in an increase in blood sugar in the body.
In addition to causing obesity, what other harms can turn on the lights while sleeping?
First, it affects the secretion of melatonin
After entering the sleep state at night, melatonin begins to be secreted, controlling the body's sleep cycle, and light will affect the secretion of melatonin.
Melatonin can inhibit sympathetic excitement, enhance immunity, and eliminate fatigue. Melatonin can also alter levels of many hormones, affecting hunger and appetite.
In addition, hormone secretion has a fixed time. If you turn on the light at night to sleep, it will reduce the secretion of melatonin, resulting in the early secretion of follicular estrogen in the body.
Every night when you turn off the lights and go to sleep, melatonin is secreted in your body. Melatonin helps to fall asleep quickly. But sleeping with the light on can affect melatonin in the body, and light will inhibit the secretion of melatonin.
If this is often the case, the body's immunity will also be impaired, causing damage to health.
Second, increase the risk of cancer
One study showed that disrupting circadian rhythms and circadian clocks 24 hours a night increased the risk of thyroid cancer. The stronger the exposure at night, the longer the exposure time, the greater the probability of cancer.
Third, it affects vision and aggravates fatigue
Continuous light at night can irritate the eyes, so that the eyes do not get enough rest, aggravate fatigue, and easily cause myopia and retinal damage.
Sleeping with the light on creates light pressure, which makes people feel uneasy and uneasy for a long time. Although falling asleep, it is difficult not to enter a state of deep sleep, so that even if there is enough sleep time, the quality of sleep will be delayed, which will aggravate fatigue and even cause insomnia and neurasthenia.
If you sleep like this regularly, your retina may be damaged and your vision will decrease.
Fourth, it will affect the quality of sleep
Light is a very strong light source, just like the body's biological clock response.
After the sun rises, the probability of people waking up will become more and more large, because the light source can awaken the brain. There are also lights at night, people who like to play mobile phones before going to bed, these light sources will affect the quality of sleep, and even affect their mood.
Fifth, endocrine disorders
Sleeping with the light on all the time will also affect the endocrine in the body, and it is easy to be in a state of disorder. When you wake up in the morning, you will find that you have not slept well, and you will be weak and your skin condition will deteriorate.
Of course, light while sleeping has some indirect effects on metabolism, but variables and actual effects are unknown.
As for the quality of sleep, you can find a relatively quiet sleep environment to ensure sufficient sleep time and develop a good habit of going to bed early and getting up early. If necessary, be sure to close the curtains and wear an eye mask when sleeping at night, and try to maintain a dark environment.
Therefore, in the burden of life, usually do not love sports, love to eat small snack habits of women, sleep off the lights can be described as your last battle line to prevent obesity!
Bibliography:
[1] Park YMM et al., Relationship between exposure to artificial light while sleeping at night and obesity risk in women, JAMA Intern Medical School.
[2] Blue light has a dark side. Harvard Health Letter. Updated: August 13, 2018, Release date: May 2012