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Not too much or too little: That's how many hours of sleep you really need, according to a study

Not too much or too little: That’s how many hours of sleep you really need, according to a study

Through Online editorial


The British study examined nearly 500,000 adults between the ages of 38 and 73. The results showed that both too much and too little sleep can be associated with poorer cognitive performance and lower mental health, particularly depression and anxiety. In addition, getting the same amount of sleep every night will also have a positive effect on your health. Finally, they reached the ideal amount of sleep for more than 38 people: about seven hours of sleep.

No less important than sports

There were obvious negative effects with more than seven hours of sleep. In the Guardian, Professor Barbara Sahakian, Department of Psychiatry, University of Cambridge, emphasized that adequate sleep is critical for any age group, but becomes even more important as we age: “It is just as important as exercise.”

Specifically, the effect of lack of sleep was most evident in the hippocampus, the brain’s memory center. For example, sleeping too much or too little is associated with smaller brain size. For example, those who slept for seven hours performed better on cognitive tests that measure processing speed, visual attention, memory, and problem-solving thinking.

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a reason

The negative effect of lack of sleep is said to be due to the disturbance in the waves of deep and light sleep, which are said to be very important for memory. The brain will also be less able to destroy toxins. But the reason for the negative effect of excessive sleep is not clear to scientists.

Finally, it was emphasized that a causal relationship between seven hours of sleep and brain disorders had yet to be demonstrated, as irregular sleep patterns could be caused by many factors.