Scientists performed MRI scans on the brains of two groups of people who woke up late and early in the morning.
Then they were allowed to do various things from eight in the morning to eight in the evening.
At the same time, they have been asked to report how much sleep they feel during the day.
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It has been found that the part that normally creates human consciousness, those who wake up at night, have less connection to that part of the brain.
Scientists say they are less focused, have delayed reactions, and are more sleep-deprived.
And those who wake up in the morning have less sleep. They also do things quickly.
Their performance has also been good throughout the day.
But those who wake up at night react completely differently after eight o'clock at night.
At that time, their sleep is reduced, and their response is faster.
Researchers say that 40 to 50 percent of people prefer to sleep late and wake up late.
Scientists say more research is being done on how it affects the health of people who stay up late and wake up late.
The main researcher of this study said. "People who have to get up in the morning in school life, maybe even earlier in their careers, have to work all their lives fighting against the rhythm of their bodies," says Alice Feser-Childs.
He says working against body rhythm is likely to hurt both their performance and health.
In the morning, their work skills may be quite low.
He thinks that if the concept of time management in society were flexible, their efficiency and health risks would be different.
Scientists have selected four types of people for this research. Those who wake up regularly every morning, those who wake up sometimes in the morning, those who sleep late sometimes, and those who wake up regularly every night. Participants in these four categories ranged in age from 36 to 63 years.
The study was later published in the International Journal of Chronobiology. The average life expectancy of a person who wakes up in the morning is six and a half years longer than that of a person who stays awake at night.
However, it involves various factors such as age, gender, ethnicity, weight, socio-economic status, eating habits, lifestyle, etc. A consistent calculation of all these factors shows that those who wake up in the morning have the lowest premature death rate. And those whose body clocks run erratically continue to increase this risk.
Ninety percent of those who have developed the habit of waking up at night suffer from various mental disorders. There is a 30 percent risk of developing diabetes. In addition, the risk of developing intestinal diseases ranging from nervous problems is greatly increased.
According to Malcolm Vaughan, a professor in the Department of Chronobiology at Surrey University, waking up at night is now a public health problem that there is no way to avoid. He said more in-depth research is needed on what steps need to be taken to overcome this problem, to adjust the body clock to the sunrise and sunset.
Kristen Knutson, an assistant professor in the Department of Medicine at Northwestern University, says chronic stress is a major cause of poor eating habits, lack of adequate sleep, lack of exercise, waking up at night, or taking drugs. As a result of such irregularities, people's sleep is reversed, he said.
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