Too much sleeping causes not only tiredness,but it makes one duller,reduces the power of concentration,discrimination,inattentiveness,anxiety prone.(Hindu Smritis).One also becomes emotionally unstable.Sleep on the other hand has no standard time duration for all individuals.Some may do with six hours ,others may need 8 hours.In excess of eight hours is generally not good excepting for those who are convalescing and women who arepregnant(in this case not at a stretch, but taken at different times as cat naps)Incidentally cat naps of about 15 minutes a day is very refreshing.
Ideally one should go to bed not later than 3 hours after sundown and get up at the crack of dawn.Sleeping during day time is to be strictly avoided.Sleeping on the left side is good for the heart, so is taking a warm drink(not liquor,not coffee/tea).One should not sleep naked-minimum clothing which is not tight is to be worn; nor in open air,in an open building, in a place with out roof or a under a tree.(Source-Smriti)
Tailpiece :If you want to wake up at a particular time during night,no alarm is needed,take a glass of water reminding yourself the time you want to wake up.Most effective.Try.Story:
(CNN) — Instead of feeling crisp and refreshed, Jesse Wu wakes up sluggish after 12 hours of sleep.
“If I sleep the right amount, I feel really good,” said the 25-year-old who lives in a suburb of Chicago, Illinois. “If I sleep too long, I feel groggy throughout the whole day.”
Like Wu, some feel exhausted after long hours of rest.
“Many people will tell you, they sleep a little worse when they sleep a long time on weekends,” said Dr. Daniel Kripke, co-director of Scripps Clinic Sleep Center in La Jolla, California. “Too much long sleep on weekends does not seem to make people feel better.” But he acknowledged that the reasons haven’t been determined
http://www.cnn.com/2009/HEALTH/10/30/oversleeping.health.effects/index.html
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