Teen Sleep Deprivation Is Worsening - and Electronic Devices Are Not the Whole Explanation

The story about teenagers and sleep has long been told as a story about individual behavior: too much time on devices, too much caffeine, too little discipline around bedtime routines. Policies aimed at the problem have followed the same logic - restrict screen time, educate families, encourage earlier bedtimes. But a national analysis published in JAMA suggests the problem is bigger and more structural than that framing implies.

The study, led by Greg Rhee, examined trends in insufficient sleep among U.S. adolescents across behavioral risk groups over multiple years. The finding that stands out is not the expected one - that high-risk students (those with heavy device use, substance use, or sedentary habits) are sleeping poorly. It is that sleep deprivation has increased as much or more among students with no behavioral risk factors at all.

What the Data Show

The analysis found a broad increase in insufficient sleep across all demographic groups. More striking, the increase was driven largely by rising rates of very short sleep - five hours or fewer per night. That threshold represents a level of sleep deprivation with well-established consequences for cognitive function, mood regulation, metabolic health, and immune function in adolescents.

When insufficient sleep rises equally among students who use devices heavily and students who do not, among students who are physically inactive and those who are active, among those who use substances and those who do not, the factor causing the increase is not specific to any of those behaviors. Something is affecting nearly all teenagers - and the analysis points toward structural and environmental factors as the likely drivers.

Structural Factors That Behavioral Interventions Miss

What structural factors could be pushing sleep loss so broadly? School start times are among the most studied. Biological changes during puberty shift the circadian clock, causing adolescents to feel alert later at night and struggle to fall asleep early. When school buses arrive at 6:30 in the morning, teenagers are trying to wake up at a time when their biology is oriented toward sleep. No amount of screen-time reduction fixes a 6 a.m. alarm.

Academic and extracurricular demands have also intensified. Homework loads, competitive college preparation, and packed after-school schedules compress the hours available for sleep regardless of how a student spends their recreational time. Economic stress in households - requiring some adolescents to work after school or take on family responsibilities - is another factor that does not show up in behavioral risk categories.

Implications for Policy

The authors argue that these trends highlight the need for population-level interventions rather than targeted approaches aimed at high-risk subgroups. Delaying school start times, reducing homework loads, and addressing economic pressures on families are interventions that could affect all adolescents - not just those identified as having behavioral risk factors.

This does not mean individual behaviors are irrelevant. Evening screen use does delay sleep onset, and substance use affects sleep architecture. But the data suggest those factors are not the primary engine of the worsening trend. Focusing policy attention almost exclusively on device use while leaving school start times and academic pressures unchanged is unlikely to reverse the population-level decline in adolescent sleep.