One in Four Adolescents Reported No Active Days in WHO Analysis of 140 Countries

A World Health Organization report released on November 4 pooled 389 population surveys from 140 countries and found that adolescent activity has barely shifted since 2010. One in four 11- to 17-year-olds reported no active day at all in the previous week.

Adolescent activity levels worldwide have stalled for 15 years, according to a pooled analysis of 389 population-based surveys published in The Lancet Global Health and released alongside a WHO global report on November 4, 2026.

The analysis covered more than 3.2 million adolescents aged 11 to 17 across 140 countries and territories, using population-based surveys collected between 2010 and 2025. Tessa Strain is the lead author, and the co-author list includes WHO surveillance and physical activity staff. The companion WHO report is titled A generation missing out: global trends in adolescent physical activity, 2010-2025.

The headline number is blunt. In 2025, about 25 percent of adolescents reported not reaching 60 minutes of moderate-to-vigorous activity on a single day of the previous week. WHO puts that at roughly 240 million young people. Only 14 percent reported being active on all seven days, and the average across the dataset was 2.7 active days per week.

Adolescent activity also split by sex. Among girls, 28 percent reported no active days, against 22 percent of boys, while 11 percent of girls were active every day compared with 17 percent of boys. WHO states that girls were less active than boys in almost every country and in every WHO region covered.

What the 389 Surveys Actually Counted

The outcome here is not minutes on a wrist monitor. It is the number of days in the past week on which an adolescent says they managed at least an hour of moderate-to-vigorous activity, the threshold WHO guidance sets for ages 5 to 17. Counting days rather than minutes makes the surveys comparable across very different school systems and cultures.

That choice shapes how the adolescent activity figures should be read. A teenager who plays one long Saturday match and nothing else scores one day. A teenager who walks briskly to school five mornings a week scores five. The measure rewards regularity, which is arguably the thing public health systems can influence.

It also means the adolescent activity totals are not directly comparable with accelerometer studies, which count minutes and capture the short bursts that young people rarely remember. The two methods answer different questions, and the day-count approach is the one that scales to 140 countries at once.

The Adolescent Activity Gap Between Girls and Boys

The sex difference is the most consistent pattern in the dataset. A six-point gap in the share reporting no active days, and a six-point gap in the share active daily, repeated across almost every country and region, is not statistical noise. It points at something structural rather than individual.

WHO frames the response accordingly, calling for work on the barriers girls face: safety, facility access, school provision and social expectation. The adolescent activity data cannot say which of those weighs most in any given country, because the surveys measure behavior rather than its causes.

It is worth stating plainly what the gap is not. Nothing in the adolescent activity dataset identifies a biological ceiling; the surveys record what girls and boys reported doing, in settings that offered them different things. A behavioral gap that appears in nearly every country is more easily explained by common features of those settings than by the adolescents themselves.

National Figures Run From 4 Percent to Above 40 Percent

Pooled global adolescent activity averages hide enormous spread. WHO reports that the share of adolescents with no active days ranged from 4 percent in some countries to more than 40 percent in others, a tenfold difference that no single explanation covers.

Those extremes matter more than the global adolescent activity figure for anyone designing a program. An intervention that suits a country where adolescent activity is already near four days a week has little in common with one needed where most teenagers report none at all.

Fifteen Years of Flat Adolescent Activity Data

The trend finding is what separates this adolescent activity report from a snapshot. Across 2010 to 2025 the global picture changed little. WHO Director-General Tedros Adhanom Ghebreyesus said that for 15 years the world has made almost no progress in getting young people moving, and that girls are being left furthest behind.

Fifteen years of flat adolescent activity numbers covers a period in which smartphones became universal, school sport budgets rose and fell, and two years of pandemic closures came and went. A measure that absorbs all of that without moving is telling us the inputs were too small to register.

There is a second reading worth holding onto. Flat global adolescent activity averages can conceal countries that improved and countries that slid back, canceling each other out in the pooled figure. The report gives the global trend, so the national detail is where any success story would have to be found.

Why the 2030 Inactivity Target Is Out of Reach

Member states committed to cutting physical inactivity by 15 percent in relative terms by 2030. WHO states that no country is currently on track to meet it. With four years left and adolescent activity flat since 2010, the arithmetic no longer works for the adolescent portion of that goal.

Tedros also made the point that the answer is not to tell adolescents to try harder. WHO instead calls for coordinated action across education, transport, urban planning, sport and health: safe walking and cycling routes, activity built into the school day, and communities where movement is the default rather than an extra.

What the Adolescent Activity Figures Mean for Families and Coaches

A global surveillance report does not prescribe anything for an individual teenager. What it does offer is a sense of scale: the typical adolescent in this dataset is short of the daily hour on four or five days a week, which is a gap of habit and opportunity rather than a gap of effort.

Reasonable, general implications drawn from the structure of the adolescent activity data:

• Days matter. Adding one ordinary active day a week moves a teenager a long way on the adolescent activity measure used here.
• Transport counts. Walking and cycling to school is activity that needs no club, fee or coach.
• Girls need the invitation made explicit, because the gap shows up almost everywhere.
• Anything sustained beats anything intense but brief, since the measure tracks regularity.

None of this is individualized advice, and a young person with a medical condition or an injury should be guided by their own clinician. Our earlier coverage of a decade of youth sport participation data in Slovenia shows how differently national trends can run from the global average.

How This Fits With Earlier Fitness Research

The pattern is familiar from work further up and down the age range. A cluster trial on activity policy in Stockholm preschools found that changing the setting, not the child, is what shifts behavior. The same logic sits underneath the adolescent activity recommendations here.

National survey work points the same way. US data on cardiovascular health among high school students and a review of community exercise programs for preventing noncommunicable disease both describe benefits that depend on access rather than willingness.