‘Once, after I did a presentation, someone came up to me and said, ‘I don’t get eight hours of sleep a night. Am I going to die?’” says Prof Russell Foster, head of the Sleep and Circadian Neuroscience Institute at the University of Oxford. “And I said, ‘Well, yes, you’re going to die. But, you know, we all die eventually.’”
This exchange is, hopefully, comforting, but it also shouldn’t be too surprising. Over the past decade or so, we’ve been repeatedly told that sleep is everything from a legal performance-enhancer to an actual superpower – and, conversely, that if we don’t get enough shuteye we’re risking an early start to our eternal slumber. But how bad is a lack of sleep, really? And if we seem to be coping fine on six hours a night, is there a chance we’re still setting ourselves up for problems further down the line?
