| Age | Minimum sleep* (in hours) | Recommended sleep* range | Usual number of naps** |
|---|---|---|---|
| 0–3 months | 11 | 14–17 | 3 |
| 4–11 months | 10 | 12–15 | 2 |
| 1–2 years | 9 | 11–14 | 1 |
| 3–5 years | 8 | 10–13 | 50% nil |
| 6–13 years | 7 | 9–11 | 40% once |
| 14–17 years | 7 | 8–10 |
Insufficient sleep leads to poor health. Adverse effects include daytime sleepiness, irritability, behavioral problems, learning difficulties, poor academic performances, and increased likelihood traffic accidents in young people.