Why Teenagers Sleep Less Than Any Previous Generation
June 22, 2025 · Frisian News
New research shows teenagers today average 6.5 hours of sleep per night, down from 8 hours in the 1990s. Smartphones, homework loads, and earlier school start times drive the collapse.
Seventeen-year-old Marcus checks his phone at 2 a.m. for the fourth time that night. He has calculus homework due at 8 a.m., school starts at 7:45, and his friends are still messaging about tomorrow's group project. He falls asleep around 3 a.m., wakes up at 6, and gets through the day on fumes. This scene plays out in millions of bedrooms across Europe and North America, and the numbers confirm what parents have suspected for years: teenagers today sleep far less than their grandparents did.
Research has found that teenagers today sleep significantly fewer hours per night than previous generations did. The decline tracks almost perfectly with smartphone adoption and social media use. Teenagers with phones in their bedrooms sleep considerably less than those without, researchers note. The problem is not that sleep has become less valuable; it is that the devices in young people's hands have convinced their brains that sleep can wait.
Schools bear some blame too. Many districts pushed start times earlier over the past two decades. Adolescent biology shifts the body clock forward by two hours during puberty, meaning a 7 a.m. start feels like 5 a.m. to a teenager's brain. When you add homework that routinely runs past 10 p.m., plus part-time jobs and extracurricular pressure to pad college applications, sleep becomes a luxury that competes with everything else. Adults built a system that leaves no room for it.
The health consequences are real and measurable. Chronic sleep deprivation in teenagers correlates with higher depression rates, weaker immune function, and worse academic performance. Paradoxically, students who sleep less also study less effectively, meaning they sacrifice rest to chase grades that suffer anyway. The brain consolidates memory during sleep; skipping it is like studying while half-conscious. Yet many teenagers view sleep as wasted time, a habit to break rather than protect.
Some schools now experiment with later starts, and a few have banned phones from classrooms. These measures help, but they treat symptoms, not the root problem. Adults have handed teenagers tools designed by engineers to capture attention and suppress impulse control, then acted shocked when teenagers cannot sleep. Until we accept that the current pace and connectivity demand hard choices, expect the next generation to sleep even less.
Published June 22, 2025 · Frisian News