For those who do not receive a good night’s rest, the lack of sleep can take a mental toll and affect things like concentration and alertness, as reported by The Atlantic.

Of course, different people require different amounts of sleep and although there’s no universal rule for how long we should all be sleeping, it’s becoming increasingly clear that working late and waking early can cause serious problems. It’s not just repeated sleep deprivation that does people in, either. Just one restless night can seriously affect us in the morning.