The Mysterious Science Of Sleep

reminds me of a post card I got "Coffee, there is plenty of time to sleep when you are dead"

Is that where the phrase "dead tired" came from?

With all scientific information aside, if I don't get enough sleep, I tend to get lethargic and moody. And, because I have low blood pressure, it seems like that too works in conjunction with lack of sleep making me even less in tune with my surroundings. So as not to go against anything stated in the article, I believe sleep is something we all need just like eating, exercise, etc. - there doesn't necessarily have to be a reason behind it - it's just a normal process like all other activities.

One thing to remember about our bodies is that they evolve according to external conditions, and learn to take advantage of external conditions. At night, it's dark outside. It's dangerous to be wandering around, more dangerous to be running, or lost, or in the presence of predators. So we take advantage of that time to rest. Over time, our bodies, and the bodies of all animals learn that there are rest periods and active periods. Many bodily functions can take advantage of this balance for process that include recovery, consolidation, etc. Some processes are 'important' but not 'urgent'. It's valuable to shuffle some of these into the night time for efficiency. I suspect there is not a single reason for sleep, but that as our bodies evolved they learned to take advantage of the night and the day - for different aspects of healthiness. to your health, tracy http://personalhealthfreedom.blogspot.ca/p/subject-index.html

Mebbe

Sleep is practice for death.