There is research that people who sleep less than seven hours of often chances are flu people easier to relax enough, because there is not enough sleep makes the body's immune system is not fully functional. There is a study and found that people who slept late frequently. It's easier to stay Unhealthy body. If the illness will cause illness slowly. In addition, there is not enough room to cause cardiac failure. Irregular heart beat, and many subsequent health disease.
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