Answered from cited sources · retrieved September 20, 2026
how much sleep do adults need
Most healthy adults need between 7 and 9 hours of sleep per night to maintain optimal health.
Most health organizations and experts recommend that adults aim for 7 to 9 hours of sleep per night to support optimal health and daily functioning. Consistently sleeping less than 7 hours is linked to various adverse health outcomes, including an increased risk of chronic conditions like heart disease, diabetes, and obesity, as well as impaired cognitive performance and mental health issues. While 7 hours is often cited as a minimum, individual requirements can differ. Some groups, such as young adults or those recovering from sleep debt, may benefit from more than 9 hours, while older adults may find 7 to 8 hours sufficient. If you have concerns about your sleep duration or quality, it is recommended to consult a healthcare provider.
- General Recommendation. Experts generally recommend that adults sleep 7 or more hours per night on a regular basis to promote health, productivity, and alertness.
- Risks of Insufficient Sleep. Sleeping less than 7 hours regularly is associated with increased risks for obesity, diabetes, heart disease, depression, and impaired immune function.
- Individual Variability. While 7 to 9 hours is standard, some individuals, such as young adults or those recovering from illness or sleep debt, may require more. Older adults may need slightly less, typically 7 to 8 hours.
- Beyond Duration. Healthy sleep involves more than just duration; it also requires good quality, regularity, appropriate timing, and the absence of sleep disorders.
Sources
- How Sleep Works - How Much Sleep Is Enough? | NHLBI, NIHnhlbi.nih.gov · published March 24, 2022
- Adult Sleep Duration Health Advisory - AASM Recommendationaasm.org · published September 13, 2019
- Sleep Deprivation and Deficiency - How Much Sleep Is Enough | NHLBI, NIHnhlbi.nih.gov
- Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Societydoi.org · published May 29, 2015
- How Much Sleep Do Adults Need? | Sleep Foundationsleepfoundation.org · published March 9, 2021
- Normal Sleep and Its Importance to Health - Sleep in Adults | FP Essentialsaafp.org · published September 1, 2025
- Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society - PMCpmc.ncbi.nlm.nih.gov · published June 12, 2015
- How Much Sleep Do You Really Need?thensf.org · published June 8, 2026
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