Sleeping for nine hours a night could be as bad for your memory as only getting five. It is well known that people who sleep fewer than five hours a night can expect memory problems. Researchers looked at memory test results for almost 400,000 people who were asked to match six pairs of hidden cards after memorising their positions. And those who slept for ten hours made 11 per cent more errors – six per cent when adjusted for people's characteristics. She added: 'Some people may think that going to bed and sleeping for as long as you like is fine, but our findings show that sleeping for too long may affect memory.'

Source: Daily Mail May 25, 2019 00:48 UTC