The human brain has a biological
clock which controls the sleep-waking cycle, which is repeatedly awakening and
sleeping in a cycle of 24 hours. When the time is right, the secretion of
melatonin, the sleeping hormone, increases and the body temperature falls. And
when the sun rises in the morning, the secretion of melatonin sharply
decreases, the body temperature rises, and the urine formation increases to
wake up.
In the medical world, the sun is
relatively late in winter, so the release of melatonin lasts longer than in the
summer, and it is expected to be more difficult to break in the morning. In the
summer, when the sun rises early in the morning and reaches the biological
clock in the hypothalamus through the eyes of a man, the secretion of
melatonin, the sleeping hormone, is drastically reduced and the mind and body
of the person are awakened.
In addition, as the amount of
physical activity during the day increases, the substance that promotes sleep
accumulates in our body, which makes it better to sleep at night. In winter,
there is a lot of time in the room and the activity of the body is shrunk due
to the cold. Often it is not possible.
Sleep and obesity, do you have
any correlation:
Recent studies have shown that
short sleep times can lead to obesity by increasing the secretion of ghrelin, a
hormone that stimulates appetite, and decreases leptin, an appetite-suppressing
hormone. Especially, in the case of high obesity, the average sleep time was
only 6 hours, while it was easy to maintain normal weight when sleeping for 7
hours and 40 minutes.
Next, those who sleep less often
increase the concentration of serum cortisol hormone at night. Cortisol tends
to awaken and store fat, so sleeping less can increase fat storage and increase
weight.
"Less sleep means more
sympathetic nervous system and slower insulin secretion after intravenous
glucose infusion," said Professor Hong Seung-bong of the Samsung Medical
Center, Sungkyunkwan University School of Medicine. "These physiological
changes due to sleep deprivation are insulin resistance, obesity, Risk factors.
"
Also, if you sleep less, you will
not be very sleepy and concentrated during the day, because your physical
fatigue will accumulate and your physical and mental activities will be
reduced, which leads to lack of exercise, which can also cause fatigue.
On the other hand, people who sleep too much can
get fat. There are two main reasons for sleeping a lot, the first being the bad
quality of night sleep. Sleep apnea with severe snoring or shortness of breath
during sleep can make it difficult to
wake up in the morning and cause more sleepiness during the day because the
quality of the nighttime sleep is worse.
The second is a phenomenon that
sleeping is very sleepy in the daytime even though there is no problem with
night sleep due to centralized sleeping hyperplasia. Because they sleep a lot
of time and get sleepy during the day, they lose weight and become fat.
That is, sleeping at the right
time helps to keep the weight properly. A good amount of sleep means that you
will not sleep when you are still without work the next day. Adults need about
7 hours 30 minutes a day, 8 hours for teenagers, and 9 hours for children.
Recent research on sleep time and
weight suggests that sleeping 7 to 30 minutes to 40 minutes a day is best for
maintaining normal weight in adults, and the lower the number of times it is,
the more likely it is to go overweight and obese If you sleep more than 8 hours
and 30 minutes, you are more likely to go to obesity.
Sleep deprivation, change of
the human body:
Sleep is not simply a break.
Non-REM sleep is a sleep that restores body fatigue such as musculoskeletal
system, heart, and gastrointestinal system, and REM sleep is memory, concentration,
control of emotion, etc. It restores mental fatigue and relieves stress during
the day.
Therefore, lack of sleep, daytime
sleepiness and tired, as well as musculoskeletal diseases, cardiopulmonary
disease, gastrointestinal diseases, such as a variety of physical diseases, no
mental concentration, poor memory, irritability, and easy to get depressed.
If you have too little sleep,
your sympathetic nerves can be aggravated, resulting in irregular heartbeats
and unstable blood pressure. It can be stress-sensitive. Also, the efficiency
of work is lowered, and the risk of accidents and various safety accidents
during operation increases.
In particular, the shortage of
sleep in children is a more serious problem, because the secretion of growth
hormone is slowed down, the growth is slow, the academic performance is poor,
and personality formation is problematic. In addition, the risk of becoming an
adult cardiopulmonary disease is increased.
The appropriate sleep time for an
adult day is about 7 hours and 30 minutes. However, the amount of sleep
required per day varies from person to person. Some people have to sleep for
five hours a day, while others have to sleep for more than nine hours.
Therefore, the appropriate sleep time for the person is not enough to sleep
when the next day is not doing anything.
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