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What is sleep?

Sleep is one of nature's greatest inventions and blessings of life. It is a periodic rest of the body which is absolutely essential for its efficient functioning. Sleeping has been known as, "the most cheering restorative of tired bodies." Actually, a lot will be expose on this tutorial.

Sleep is the indispensable condition to the recopuration of energy.  For instance, we go to bed with fatigue and high stress level but wake up being refreshed. Sleep repairs the wears and tears of the body and mind incurred during working hours. Nothing is so restorative to the nerves as sound and uninterrupted sleep.

Sleep is therefore a vital way of life. It is a basic needs in man's mental as well as physical life. During sleep most of the functions of the body are carried on at the lowest level possible for healthy body regulation. Heat production is from 10 to 15 percent below the basal level. The mechanism regulating the body are less sensitive than in the waking state and are depressed by 0.5 to 1.00 degree F.

The rate of the heart beat is reduced by 10 to 30 beats per minutes and a decline in the blood pressure, of about 20 mm occurs in quite restful sleep. The urine volume is considerably reduced, but its concentration in solid increases during sleep hour. The tune of all the skeletal muscles is lessened. The eyes are usually roll upward and the pupils constricted. Loss of sleep have serious detrimental effect on the immune system. Long period of wakefulness may cause physiological and psychological changes, such as loss of memory, irritability, hallucination also schizophrenic manifestation if care is not taken. During the second Word War, the prisoners which were kept at the Nazis Concentration Camp in Germany awake, for days by strong lights and blaring wireless sets, collapse before those which were left in the dark alone.

After a brief introductions of the importance of sleep to the body and health generally and its negative effect when we deprive ourself the right to sleep, let's study sleep durations and best sleep durations.

Also read 12 Top Strategies to Reduce Stress Level to Normal continue this articles @ www.anctherapist.com