What is sleep and why do we do it? It may at first seem glaringly obvious, but the question of sleep is actually quite mysterious. In simple terms, it is an extended bout of rest we experience on a daily basis, where we most often lay down with our eyes closed. But there’s more to sleep than meets the eye.
The average person spends around a third of their life asleep. In this time, our bodies are able to replenish energy stores and make repairs, while our minds organise and store the memories of the day before. The amount of sleep you need depends on your age, sex, health and other elements, and sleep cycles change as we grow older.
However, here is a general guide.