This is probably why you still feel tired even after eight hours of sleep, according to a sleep doctor

Woman sitting up in bed with her palm on her forehead and her eyes closed.

Eight hours is often considered the gold standard for sleep. But if you’ve found yourself waking up feeling groggy even after hitting this target, a sleep doctor might have the answer.

According to Dr Alanna Hare, sleep doctor and Sealy sleep expert, everyone will have different sleep needs, but the hours you spend snoozing are only one part of the puzzle.