CONSENSUS STATEMENT• Adults should sleep 7 or more hours per night on a regular basis to promote optimal health.• Sleeping less than 7 hours per night on a regular basis is associated with adverse health outcomes, including weight gain and obesity, diabetes, hypertension, heart disease and stroke, depression, and increased risk of death.Sleeping less than 7 hours per night is also associated with impaired immune function, increased pain, impaired performance, increased errors, and greater risk of accidents.• Sleeping more than 9 hours per night on a regular basis may be appropriate for young adults, individuals recovering from sleep debt, and individuals with illnesses.For others, it is uncertain whether sleeping more than 9 hours per night is associated with health risk.• People concerned they are sleeping too little or too much should consult their healthcare provider. METHODOLOGYHealthy sleep requires adequate duration, good quality, appropriate timing and regularity, and the absence of sleep disturbances or disorders.Sleep duration is the most frequently investigated sleep measure in relation to health.Furthermore, Sleep is essential for optimal health.The American Academy of Sleep Medicine (AASM) and Sleep Research Society (SRS) developed a consensus recommendation for the amount of sleep needed to promote optimal health in adults, using a modified RAND Appropriateness Method process.The recommendation is summarized here.
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