Unbalanced sleep is a real danger. Specialists put the wall both sleepless and excessive sleep, that's why
Unbalanced sleep can severely affect your cognitive abilities. How many hours of sleep the specialists recommend.
A sleep less than seven hours or more than nine hours may have a negative effect on a person's cognitive performance, such as visual memory and response time, according to a study by University College London (UCL), quoted by Xinhua.
A team of scientists from UCL analyzed data from almost 400,000 participants registered in the UK Biobank database but also in the International Genomics of Alzheimer's Project in an attempt to identify a possible association between sleep and function cognitive and dementia, Agerpres writes.
Researchers found that people who slept less than seven hours made several errors (5%) in a visual memory test, and those who slept over nine hours were even more mistaken (9%) for this test.
"We recommend that most healthy adults follow the (sleep) recommendation between seven and nine hours," said UCL's Victoria Garfield, one of the study's authors.
"Overall, our study emphasizes the importance of sleep duration in relation to cognitive function. This suggests that improving sleep habits could be beneficial to cognitive health, "noted Albert Henry, another researcher at the same university.
To analyze the association between insufficient or excessive sleep and dementia, more studies are needed, scientists have noted.