Is sleep good for you?

Is sleep good for you?

Sleep is absolutely vital for good functioning, but there is another side to sleep. Peak mortality occurs around eight in the morning but it starts to increase from around four in the morning. We're not entirely sure what's going on, but part of the reason may be that the blood comes a little bit thicker during sleep because we are not moving around as much. And also, as the end of the night tends to be rapid-eye movement sleep where a lot of the physiology is less regulated than it usually is, one gets more extremes as the heart rate can go up and down and whatever. The combination of all these things leads to more heart attacks and strokes around the time of awakening in an hour or two later.