Is it necessary to sleep 8 hours a day

Physiological need for sleep varies according to age. Sleeps 18-20 hours a day for a new born baby. A little boy sleep 12-14 hours a day. An adult person per day varies between 7-9 hours sleep time, at least 5-6 hours of sleep per day is required in the elderly. Human sleep and would have as much as the young. An adult person must be at least 5-6 hours sleep. Normal sleep 7-9 hours. In some cases, people even sleep in 10 hours is not abnormal. for the body because it may be a need for.

Phase passes through a normal night of sleep 5. Also experienced the so-called rabbit's sleep to dream. and often woken up after dreaming. Or, during a dream. During the first 1-2 hours of sleep is an important growth hormone in the body, and then secretes the hormone cortisone. From the fatigue resulting from long-time sleep, caused by the lack of hormones mentioned. Review, some people are complaining can not get sleep, slept a normal person shows up. These people can not play them for that deep and long sleep patterns. They have to get out of bed early in the morning.