The first four stages is the key to improving health metabolism, learning, and recall (memory). While the fifth or final stage (rapid eye movement / REM) necessary to restore the mood and form emotional memories. Missed one or two cycles, then the immune system, heart health, brain function, will be disrupted.
More than 8 hours
Sleep more than eight hours is also not good for the body; raise the sugar levels are identical with diabetes type 2, according to the journal Diabetes Care. And sleeping more than nine hours associated with increased risk of death, say researchers from the University of California, San Diego.
Less than 7 hours
if you sleep less than seven hours each night, probably three times as you suffer from cold and flu. The reason, sleep helps improve the body's response to infection. Excess weight is also a concern. We produce more ghrelin hormone associated with appetite and less leptin when we lack sleep.
6 hours or less
you may think your body functions running fine when sleeping six hours or less. But, sleeping six hours or less a night just for two weeks will affect your memory, time to react to a thing, the brain and cognition in general. The same result happens if you stay awake for more than 48 hours. Thus confirmed a study from is the University Of Pennsylvania School Of Medicine, Philadelphia.
5 hours or less
Slept five hours or less will weaken the body's ability to regulate blood sugar levels, which double your risk of type 2 diabetes, according to the journal Diabetes Care. And people who slept five hours or less a night, 50 percent more likely experience high blood pressure than those who slept more than six hours. This is likely due to increased hormone levels of cortisol, stress hormones that constrict the heart arteries, according to a report in the journal Sleep.
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