American scientists after their experiment concluded that three days off instead of two are necessary for man’s normal existence.
159 adults participated in the scientific experiment, who during the week slept for 4 hours a day, and on Saturday and Sunday – 10 hours. Then, at the end of the weekends, the researchers examined the state of the participants in the experiment and concluded that the two weekends for a full rest is totally insufficient, and the main reason for this – lack of sleep – the Science journal writes. But as is known, a chronic lack of sleep leads to serious deterioration of health and even reduces life expectancy. To remedy this situation, scientists believe one must either add a third day off, or sleep for 14 hours on Saturdays and Sundays.
Modern somnologists state that an adult person needs at least 5 hours of sleep at night for a healthy life. Besides, experts believe that naps are rather harmful to health – a parallel experiment demonstrated that people, who prefer to have a nap during the day develop the risk of diabetes nearly by a third.
It is curious that in the 21st century, professionals dramatically lowered the bar of vital sleep. In the 90s of the last century, somnologists believed that a person needs 7-8 hours of sleep for a healthy life, after 10-15 years this figure had fallen to 6.5 and then to 5 hours.
Source of the image: Photl