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  | Sleep is an important part of a healthy lifestyle. According to the National Heart, Lung and Blood Institute, an estimated 70 million people have trouble sleeping. You probably try to exercise and eat a healthy diet, but what about get a good night's sleep? Adults need between seven and nine hours of sleep each night, but most average only 6.9 hours of sleep. If you have trouble sleeping, read through our sleep tips. If you feel fatigued and tired after a night of sleep, take our sleep quiz. You may suffer from a sleep disorder. Adults who suffer from a sleep disorder usually don't have trouble falling asleep; they simply don't get restful sleep. 
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