A recent study by British scientists found that sleeping less than 7 hours or more than 9 hours a day could affect people's cognitive processes such as visual memory, reaction time.
Accordingly, a University of London research group (UCL) conducted an analysis of the records of nearly 400,000 people from the long-term research project named UK Biobank and the International Genetic Structure Research Project, to determine whether there is a relationship between sleep with awareness and dementia .
The results showed that the error rate in the visual memory test for those who slept less than 7 hours a day was 5%, while the rate for those who slept more than 9 hours a day was 9%. .
Senior researcher Professor Victoria Garfield of UCL's Institute of Cardiovascular Sciences said healthy adults should seriously take a regular sleep routine, between 7 and 9 hours a day.
Meanwhile, lead researcher, scientist Albert Henry said this study shows the relationship between sleep time and cognitive function, so improving sleep habits can be beneficial to receiving health. human consciousness .