How Much Sleep Do You Really Need?
Sleep needs change dramatically across your lifespan. Find the right amount for your age group based on expert guidelines.
하루에 얼마나 자야 할까요?
나이에 따라 필요한 수면 시간이 달라요. 미국 국립수면재단과 CDC 권장 기준이에요:
| 연령대 | 나이 | 권장 수면 시간 |
|---|---|---|
| 신생아 | 0-3개월 | 14-17시간 |
| 영아 | 4-12개월 | 12-16시간 |
| 유아 | 1-2세 | 11-14시간 |
| 미취학 아동 | 3-5세 | 10-13시간 |
| 초등학생 | 6-12세 | 9-12시간 |
| 청소년 | 13-18세 | 8-10시간 |
| 성인 | 18-64세 | 7-9시간 |
| 고령자 | 65세 이상 | 7-8시간 |
Select Your Age Group
Why Sleep Needs Change with Age
Babies need the most sleep because their brains are developing rapidly. Sleep supports neural connections, growth hormone release, and immune system development.
Teenagers need more sleep than adults due to ongoing brain development, hormonal changes during puberty, and the natural shift in their circadian rhythm that makes them night owls.
Adults need 7-9 hours for optimal cognitive function, physical health, and emotional regulation. Older adults may need slightly less but often have more fragmented sleep patterns.
자주 묻는 질문
Can I train myself to need less sleep?
No, you cannot train yourself to need less sleep. While some people have genetic variations that allow them to function on less sleep, most adults genuinely need 7-9 hours. Chronic sleep restriction leads to cognitive impairment even if you feel adapted to it.
Is it true that older adults need less sleep?
Older adults (65+) need about 7-8 hours, only slightly less than younger adults. However, they often have difficulty getting uninterrupted sleep due to changes in sleep architecture, medications, and health conditions.