Quick Answer: The National Sleep Foundation (NSF) recommends 7 to 9 hours of sleep for adults aged 18 to 64, and 7 to 8 hours for those 65 and older. The NSF is a US-based non-profit that publishes sleep research guidelines. Canadians have similar needs, with Statistics Canada data showing about one-third of Canadian adults report regularly sleeping less than the recommended amount.
In This Guide
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What Is the National Sleep Foundation?
The National Sleep Foundation (NSF) is a non-profit organisation based in the United States, founded in 1990. Its stated mission is to improve health and well-being through sleep education and advocacy. The organisation is best known to the general public for its sleep duration recommendations, which have been widely cited by health authorities, media, and healthcare providers in both the US and Canada.
The NSF conducts and publishes research, produces consumer education materials, operates certification programs for sleep-healthy products, and runs the annual "Sleep in America" poll, which tracks sleeping habits among American adults across demographic groups. Their research program has produced influential work on sleep deprivation, sleep disorders, and the relationship between sleep and overall health.
It is worth noting for Canadian readers that the NSF is a US-based organisation. Their primary research and polling involves American participants. While sleep physiology does not differ between Americans and Canadians, some environmental, demographic, and cultural factors affecting sleep habits do vary. Canadian-specific data comes primarily from Statistics Canada, the Canadian Sleep Society, and the Public Health Agency of Canada.
NSF Sleep Hour Recommendations by Age
The NSF published updated sleep duration recommendations in 2015 following a comprehensive review by a panel of 18 medical experts across multiple disciplines. The recommendations were revised again in subsequent years and represent the current consensus on appropriate sleep duration ranges.
| Age Group | Recommended Hours | May Be Appropriate | Not Recommended |
|---|---|---|---|
| Newborns (0 to 3 months) | 14 to 17 hours | 11 to 19 hours | Less than 11 or more than 19 |
| Infants (4 to 11 months) | 12 to 15 hours | 10 to 18 hours | Less than 10 or more than 18 |
| Toddlers (1 to 2 years) | 11 to 14 hours | 9 to 16 hours | Less than 9 or more than 16 |
| Preschoolers (3 to 5 years) | 10 to 13 hours | 8 to 14 hours | Less than 8 or more than 14 |
| School-age children (6 to 13 years) | 9 to 11 hours | 7 to 12 hours | Less than 7 or more than 12 |
| Teenagers (14 to 17 years) | 8 to 10 hours | 7 to 11 hours | Less than 7 or more than 11 |
| Young adults (18 to 25 years) | 7 to 9 hours | 6 to 11 hours | Less than 6 or more than 11 |
| Adults (26 to 64 years) | 7 to 9 hours | 6 to 10 hours | Less than 6 or more than 10 |
| Older adults (65 years and older) | 7 to 8 hours | 5 to 9 hours | Less than 5 or more than 9 |
These are ranges, not absolute targets. Individual sleep needs vary based on genetics, health status, activity level, and other factors. Some adults genuinely function well on 6 hours; others need 9 hours to feel restored. The ranges represent the population distribution of healthy sleep needs rather than a single universal target.
How the Recommendations Are Developed
The 2015 NSF recommendations were developed through a structured consensus process. A panel of 18 experts was assembled from fields including sleep medicine, paediatrics, neurology, gerontology, gynaecology, psychiatry, and other relevant disciplines. The panel reviewed more than 300 current scientific publications on sleep duration and health outcomes.
The panel rated each combination of age group and sleep duration as "recommended," "may be appropriate," or "not recommended" based on the body of evidence. The final recommendations required two-thirds consensus from the full panel. This process is more rigorous than simple review articles but less so than systematic meta-analyses conducted by bodies like the Canadian Task Force on Preventive Health Care.
The recommendations have been broadly endorsed by the American Academy of Sleep Medicine, the American Academy of Paediatrics, and cited approvingly by Health Canada in its sleep health materials, suggesting the consensus transfers reasonably well to a Canadian context.
What Sleep Duration Research Actually Shows
Large-scale epidemiological studies consistently show a U-shaped relationship between sleep duration and health outcomes. Both too little sleep (under 6 hours) and too much sleep (over 9 to 10 hours for adults) are associated with increased mortality risk, cardiovascular disease, and cognitive impairment. The association with poor health outcomes for long sleep duration is thought to reflect underlying illness causing extended sleep rather than long sleep itself causing harm. Short sleep, by contrast, appears to be a more directly causal risk factor for several conditions.
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Canadian Sleep Patterns: What the Data Shows
While NSF data is US-based, Statistics Canada provides relevant Canadian data on sleep habits. The Canadian Community Health Survey (CCHS) includes sleep-related questions and has produced several analyses on Canadian adult sleep patterns.
Key findings relevant to Canadians:
Approximately 35 percent of Canadian adults report sleeping less than the recommended 7 to 9 hours per night regularly. This is broadly consistent with American data from NSF polls. Working-age adults (25 to 54) show the highest rates of short sleep duration, likely reflecting work and family demands.
Canadian data from Statistics Canada's 2017 to 2018 CCHS showed that men were more likely than women to report short sleep duration, while women reported higher rates of sleep dissatisfaction and diagnosed sleep disorders.
Seasonal variation matters in Canada in a way that is less prominent in US-focused research. The extreme variation in daylight hours between summer and winter in Canada (and particularly in northern regions) affects circadian rhythms and sleep patterns in ways that US research from lower latitudes may not fully capture.
How to Apply the Sleep Duration Guidelines
The NSF recommendations are a starting point, not a prescription. Here is how to use them practically:
Track your actual sleep: Most adults significantly overestimate how much they sleep. Time in bed is not the same as sleep time. If you are in bed for 8 hours but spend 45 minutes falling asleep and wake twice during the night, your actual sleep time may be closer to 6.5 hours.
Note your daytime function: The best indicator of whether you are getting adequate sleep is how you function during the day. Persistent daytime sleepiness, difficulty concentrating, reliance on caffeine to maintain alertness, and mood irritability after adequate time in bed are signs of insufficient sleep quality or quantity.
Consider sleep quality, not just duration: 8 hours of fragmented, light sleep does not provide the same restorative benefit as 7 hours of consolidated, quality sleep with appropriate deep and REM sleep stages. If you are sleeping the recommended duration but still feel unrefreshed, sleep quality may be the issue worth investigating.
Chronic short sleep is cumulative: Sleep debt accumulates. Sleeping 6 hours per night for two weeks produces cognitive impairment equivalent to 24 hours of total sleep deprivation, according to research from the University of Pennsylvania published in Sleep journal. The damage is not fully recovered in a single long sleep on the weekend.
The Sleep Environment Role
The NSF's research also highlights sleep environment as a significant factor in sleep quality. Their "Bedroom Poll" surveys have identified several environmental factors that correlate with better sleep quality, including room darkness, cool temperature (around 18 to 20 degrees Celsius is widely cited as optimal for sleep), quiet, and mattress comfort.
The mattress specifically is identified in multiple NSF-associated publications as a key variable in sleep quality. Research cited by the NSF from Jacobson et al. (2008) found that participants who replaced older mattresses reported significant improvements in sleep quality, pain, and stress. This suggests that mattress condition matters alongside sleep hygiene practices like consistent schedules and screen limits.
Helping Brantford Families Sleep Better
At Mattress Miracle, we have been helping Brantford families improve their sleep since 1997. While sleep hygiene habits matter, the mattress you sleep on plays a real role in sleep quality. If you are sleeping the right number of hours but waking unrefreshed, it may be worth evaluating whether your mattress is still providing appropriate support and comfort for your current needs.
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- Restonic ComfortCare Dalton and Albany
- Whitney double-sided bamboo mattress
- Somnia 3.0 neck support pillow
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Call 519-770-0001Frequently Asked Questions
Is the National Sleep Foundation a government organisation?
No. The National Sleep Foundation is an independent non-profit organisation, not affiliated with any government. It is based in the United States and funded through membership, partnerships, and charitable contributions. Health Canada and the Public Health Agency of Canada produce their own sleep health materials, sometimes drawing on NSF research.
Do Canadians need different sleep amounts than Americans?
Sleep physiology is the same across populations. The recommended durations apply equally to Canadians. However, Canada's more extreme seasonal light variation compared to most of the US does introduce circadian rhythm considerations that US-centric research may underemphasise. Canadians living at higher latitudes may benefit from particular attention to light exposure management for circadian health.
What happens if I consistently sleep less than 7 hours?
Chronic sleep restriction below 7 hours is associated with impaired cognitive performance, mood disturbances, weakened immune function, increased cardiovascular risk, metabolic changes that increase type 2 diabetes risk, and elevated risk of accidents. Research suggests these effects accumulate over time and are not fully remedied by occasional longer sleep periods.
Is more sleep always better?
No. The NSF recommendations have upper limits as well as lower limits. Consistently sleeping 10 or more hours per night in adults is associated with worse health outcomes in population studies, though this is largely believed to reflect underlying illness causing long sleep rather than excess sleep causing harm. The recommended range for most adults is 7 to 9 hours.
What does the NSF say about napping?
The NSF recognises napping as beneficial for some people, particularly those with insufficient overnight sleep. A nap of 20 to 30 minutes (sometimes called a power nap) can improve alertness and performance without causing significant sleep inertia. Longer naps can interfere with overnight sleep, particularly for those with insomnia. Napping is not a full substitute for adequate overnight sleep.
Sources
- Hirshkowitz M, et al. "National Sleep Foundation's sleep time duration recommendations: methodology and results summary." Sleep Health, 2015.
- Statistics Canada. "Sleep Habits of Canadians." Canadian Community Health Survey, 2017-2018. statcan.gc.ca.
- Public Health Agency of Canada. "Are Canadian Adults Getting Enough Sleep?" phac-aspc.gc.ca, 2022.
- Van Dongen HPA, et al. "The cumulative cost of additional wakefulness." Sleep, 2003.
- Jacobson BH, et al. "Grouped comparisons of sleep quality for new and personal bedding systems." Applied Ergonomics, 2008.
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If you are getting the recommended hours of sleep but still waking up feeling unrested, your mattress may be part of the problem. Come in and let us help you assess whether a new sleep surface could make a difference for your family.