How many hours of sleep do we actually need? And why it is so healthy? What the terms "owl" or "lark" are all about and which stages we go through during the night, we have summarized for you in the following, together with our experts.
We reveal the most important background information on the subject of healthy sleep
At night, we lie motionless in bed for hours and nothing happens – one might think. "Far from it," says Andreas Eger. "Sleep is vital for us, and our bodies are highly active during it."
Why we sleep at all has not been precisely clarified to this day. What is known, however, is that healthy sleep is essential for life. It is not simply the opposite of active wakefulness. Certain bodily functions are even very active.