Although sleep needs vary slightly from person to person, most healthy adults need seven to nine hours of sleep a night to function at their best. Children and teens need even more. And despite the idea that our sleep needs decrease with age, most older people still need at least seven hours of sleep. Because older adults often have trouble sleeping that long at night, daytime naps can help fill that gap.
The amount of sleep you need to stay healthy, alert and active depends on your age and varies from person to person. Most adults need at least seven hours of sleep each night.