How much sleep do I need? In general, it is recommended to sleep for 7 hours or more. Everyone's sleep quality is different, and many people still feel unrefreshed despite sleeping for more than 7 hours. For this reason, it is crucial to assess the effectiveness of one's sleep with a sleep study and clinical evaluation. These studies can be done in a sleep clinic or in the comfort of your own home. If your sleep is constantly being interrupted by apnea (cessation of breathing because of airway closure) or other sleep issues, you can sleep all night without feeling rested, because your sleep is constantly being interrupted!