Recommended Sleep Duration (Adults 7–9 h)
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Adults need at least 7 hours per night for health (CDC/AASM); 7–9 hours is the common target, and physically active people and athletes often sit at the upper end or higher.
Detail
The American Academy of Sleep Medicine and the CDC recommend that adults sleep 7 or more hours per night on a regular basis for optimal health. Popular guidance frames the adult range as 7–9 hours. Sleeping fewer than 7 hours regularly is associated with weight gain, diabetes, hypertension, heart disease, depression, and increased mortality and accident risk.
Needs vary by age (younger people need more):
| Group | Typical recommendation |
|---|---|
| Adults (18–60) | ≥7 h (commonly framed 7–9 h) |
| Older adults (65+) | 7–8 h (see seniors) |
| Teens (13–18) | 8–10 h (see youth-training) |
| School-age (6–12) | 9–12 h |
Athletes and hard trainers often benefit from the upper end (8–10 h) because training adds a recovery demand; some elite athletes are studied at 9+ h, and sleep-extension trials have improved sprint times, accuracy, and reaction time. Both too little and chronically excessive sleep (>9–10 h regularly in adults) associate with worse health outcomes, though long sleep is often a marker of underlying issues rather than a cause.
Quality matters alongside quantity: 7 fragmented hours is not equal to 7 consolidated hours (see sleep-architecture, sleep-hygiene).
Key facts
- Adults: ≥7 h/night (CDC/AASM); common target 7–9 h.
- Teens 8–10 h; older adults 7–8 h.
- Athletes/hard trainers: upper end 8–10 h often beneficial.
- Quality (consolidation) matters as much as raw hours.
Connections
- sleep-debt — what accumulates below target.
- poor-sleep-and-training — performance cost of falling short.
- youth-training / seniors — age-specific needs.
- sleep-hygiene — getting the hours you target.
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.