Eight hours is widely known as the gold standard, but the amount of sleep you actually need varies by age [1].
National Sleep Foundation Recommended Sleep Duration
- Newborns (0–3 months): 14–17 hours
- Infants (4–11 months): 12–15 hours
- Toddlers (1–2 years): 11–14 hours
- Preschoolers (3–5 years): 10–13 hours
- School-age children (6–13 years): 9–11 hours
- Teenagers (14–17 years): 8–10 hours
- Adults (18–64 years): 7–9 hours
- Older adults (65+): 7–8 hours [1]
Why Do Teenagers Need More Sleep
At puberty, the timing of melatonin release shifts 1–2 hours later [2]. This is the biological reason teenagers stay up late at night. When schools start early, chronic sleep deprivation follows.
A Teacher’s Observation
Before scolding a student for drowsiness in first period, you need to understand their biological clock. Kelley et al. (2015) report that when middle and high school start times were pushed back to 10 AM, grades improved significantly [3].
As a teacher, I’ll admit it — a 7:40 AM arrival time doesn’t match the adolescent brain. But if the system can’t be changed, the next best thing is teaching students the science of sleep and empowering them to manage it themselves.
References
- Hirshkowitz, M., et al. (2015). National Sleep Foundation’s sleep time duration recommendations. Sleep Health, 1(1), 40-43.
- Carskadon, M. A. (2011). Sleep in adolescents: the perfect storm. Pediatric Clinics, 58(3), 637-647.
- Kelley, P., et al. (2015). Is 8:30 a.m. still too early to start school? Sleep Health, 1(2), 143-151.
Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making health-related decisions.