Why we need to sleep?
To this question, there is no exact answer but there are several theories in research such as our bodies to repair themselves during sleep. The brain relies on sleep interval to arrange ideas and knowledge. Sleep is to reduce energy consumption and sleep there to reduce the risk that there will be danger to life.
How much sleep is enough?
The interval in which we sleep differently in each age range, Yes, because there is a difference in the function of hormones and brain waves while asleep. Newborn sleep 16-20 hours per day. Children from 10-12 hours per day. Teenagers 9-10 hours per day and adults 6-10 hours per day.
Childhood Sleep is essential and important, because hormones on growth (Growth Hormone) secretion comes out while asleep. In addition, there are studies of children in wairian if there is not enough sleep affects learning. Because, look, sleep, lethargic, sleeping in lessons concentrate studying fatigue easily frustrated. It was found that when these kids without being treated and have a good sleep hygienic conditions. Most effective bright cheerful students better.