The clock of life is what determines the rhythm of natural and intended to address the relatively fixed. To do that is to go against the natural mechanism, inevitably affect the body course.Examples of people who have to work night, amid the light of fire, therefore, have the opportunity to meet with the darkness of the night. As a result, the brain produce melatonin substances along with less employees and people who like to work as a hospital security guard sample shift or truck drivers, etc., which have to work during the day and night. Make the body a natural mechanism to persist result of rhythm clocks changed from the original, such as pilot or air conditioner home State must fly across different time zones. Body fatigue Stress and fatigue or Jet Lag is called.
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