How much sleep do we really need? How much sleep do you get? According to a new study from Medical Express, sleeping too much is just as bad as sleeping too little.
The researchers found that people who slept for four or five hours a night would perform on tests like their brains were nine years older, but also saw the same effect on people who slept for over 10 hours a night.
The survey found the biggest abilities you lose when you sleep too much or too little are your reasoning and verbal skills.