Written by Vardan Patel
Co-Creator & Health and Fitness Content Creator at FitHub 365
Vardan combines his personal experience with exercise and healthy lifestyle habits with research from reputable health organizations and scientific sources to create practical, beginner-friendly health and fitness content.
Key Takeaways
- Global data suggest the large majority of teenagers don’t reach the WHO’s one-hour-a-day activity target, and the problem has barely improved over about 15 years.
- Screens are a likely contributor, but researchers haven’t proven they are the main cause. Study habits, safety, transport and school culture matter too.
- Some movement is better than none. The WHO advises starting small and building up gradually.
- Replacing even light sitting time with light activity has health benefits.
- Anyone with pain, a medical condition or worrying symptoms should talk to a doctor before increasing activity.
What “lack of movement” actually means
It helps to separate two ideas that often get mixed up.
Physical inactivity means not getting enough exercise or active time overall. Sedentary behaviour means the hours you spend sitting or lying down while awake, whether that’s in a classroom, on a bus, at a desk or on a phone. A person can do a 30-minute workout and still spend the rest of a day almost entirely sitting. Both patterns matter, and they overlap heavily in the daily life of many young people.
Gen Z, roughly those born between the late 1990s and early 2010s, is now a wide group: school students, college-goers and young professionals. Their routines differ, but a lot of them share one thing. Study, work, entertainment and socialising have all drifted onto screens, and screens are usually used sitting down.
How much movement is enough?
The World Health Organization (WHO) published updated guidelines in 2020. For children and adolescents aged 5–17, it recommends an average of at least 60 minutes a day of moderate-to-vigorous, mostly aerobic activity across the week. It also advises limiting sedentary time, especially recreational screen time. Adults, which now includes most of Gen Z, are advised to aim for 150–300 minutes of moderate-intensity activity a week, or the vigorous equivalent.
Two points in those guidelines are easy to miss. First, “moderate” means activity that raises your heart rate and breathing noticeably, such as brisk walking, cycling or dancing, where you could talk but not sing. Second, the WHO states that doing some activity is better than doing none, and that people who aren’t meeting the targets should start small and increase gradually. The guidelines are a destination, not a pass-or-fail test.
What the numbers say about young people
The most widely cited figure comes from a WHO-led analysis published in The Lancet Child & Adolescent Health. It pooled school-based surveys carried out between 2001 and 2016, covering about 1.6 million students aged 11–17 in 146 countries. About 81% of them didn’t meet the one-hour recommendation. Girls were worse off: roughly 15% met it, compared with 22% of boys. The researchers also found almost no improvement across the 15-year period.
Those findings deserve a careful reading.
- The data end in 2016. They don’t show what has happened since, including the effects of the COVID-19 years or of newer apps and platforms.
- The students are mostly younger than today’s Gen Z adults. The numbers describe adolescents, not 22- or 27-year-olds.
- Most of the data are self-reported. People tend to misjudge how active they are.
- “Growing” is not exactly what the study showed. Inactivity looks persistently high rather than clearly rising. That is still a serious finding, but it means we should be cautious about claiming a sudden collapse in movement.
- The study didn’t test causes. A WHO author suggested the “electronic revolution” as a likely factor, but that was an informed suggestion, not a result.
In other words, the honest headline isn’t “Gen Z has stopped moving.” It’s that most young people worldwide fall short of the guideline, and the trend hasn’t improved.
Screens fill the free hours
Phones, streaming and games compete directly with the free time that once went to playing outside. They are also the main way many young people stay in touch with friends, which makes cutting back socially costly. The evidence linking screen time to lower activity is stronger for sedentary time than for the idea that screens alone “cause” inactivity, so it’s best to think of screens as one factor among several.
Study pressure squeezes out play
In India, many students go from school to coaching or tuition, then to homework and exam preparation. When the day is that full, physical activity is often the first thing dropped, and in some schools sports periods are treated as optional. Competitive exam culture exists elsewhere too, so this isn’t only an Indian story, but it’s a particularly visible one here.
Daily life needs less walking
Rides to school, lifts instead of stairs, food and groceries delivered to the door, and work-from-home or hybrid jobs all remove small bouts of movement that used to be automatic. None of these changes is bad in itself. Added together, they quietly remove a lot of steps.
Safety, space and access
Not everyone has a safe park, a footpath, a playground or a gym nearby. Heat, air pollution, traffic and, for many girls and young women, concerns about safety in public spaces can make outdoor activity difficult. The WHO’s own research highlighted that physical activity promotion is often aimed more at boys, and its guidelines call for safe and fair opportunities for everyone. If a young person isn’t moving, a lack of willpower is sometimes the wrong explanation.
Exercise can feel intimidating
A school fitness test, a crowded gym or social media filled with polished workouts can make beginners feel they don’t belong. When exercise is framed as performance or appearance, people who don’t feel confident can simply opt out.
Why it matters
The WHO reviewed the evidence behind its guidelines. For children and adolescents, it found that more physical activity improves cardiorespiratory and muscular fitness and has positive effects on cognitive function and academic outcomes. The review rated the evidence on activity and healthy weight in this age group as low certainty, so exercise shouldn’t be sold as a guaranteed weight solution.
Beyond that, long periods of sitting are associated with poorer health in adults, and the WHO advises replacing sedentary time with activity of any intensity, including light activity. Many studies on mood, energy and sleep are observational, which means they show a link but can’t prove that movement causes the improvement. Many people do report feeling better when they move more, but you shouldn’t expect exercise alone to treat anxiety, depression or other health conditions.
If you only have a few minutes
- Stand up and walk for two to five minutes after every hour of sitting. Pace during phone calls.
- Take the stairs when it’s one or two floors.
- Stretch or do a few squats while the kettle boils or the video loads.
If you can make small habit changes
- Walk or cycle part of the way to college, tuition or work. Getting off the bus or metro a stop early counts.
- Walk with a friend instead of meeting at a café or mall. A conversation makes the time pass.
- Do household work briskly. Sweeping, carrying groceries and cleaning are real activity.
- Set a simple step goal you can already nearly reach, then raise it slowly. There is no need to jump straight to a big number.
If you want something more structured
- Choose an activity you enjoy: badminton, cricket in the neighbourhood, football, swimming, skipping, dance, garba, Zumba, yoga or a weekend trek. Enjoyment predicts whether you’ll keep going.
- Try a short bodyweight routine at home (squats, push-ups on the knees or toes, planks, lunges) two or three times a week. It needs no equipment and no membership.
- Join a class or a group. Being expected somewhere helps consistency.
Keeping screens from taking over
- Notice when you’re sitting because you want to and when you’re sitting from habit.
- Pair screens with movement: take calls on foot, watch a show while stretching, or play active games.
- Keep phones away for the last hour before bed, which also helps sleep. That’s a separate topic, but it’s closely connected to energy and activity.
Common mistakes
- Doing too much too soon. Sudden intense workouts after months of inactivity can cause soreness or injury and put people off.
- Waiting for the perfect plan. Ten minutes of walking beats a perfect routine you never start.
- Measuring only by looks. Fitness, energy and stamina matter whether or not the mirror changes.
- Skipping recovery. Rest days and sleep are part of the process.
What this article can’t promise
Being more active won’t automatically fix tiredness, low mood, weight concerns or a medical condition. Results vary with age, health, sleep, diet, stress and many other factors, and no particular timeline for change is guaranteed. Also, general guidance doesn’t replace personalised advice.
Speak to a doctor or qualified professional before increasing activity if you have a heart or lung condition, diabetes, joint or back problems, are recovering from an injury or illness, are pregnant, or take medicines that may be affected. Stop and seek medical help for chest pain, severe breathlessness, fainting or dizziness during exercise. If low mood or anxiety is affecting daily life, a mental health professional can help in ways that exercise alone can’t.
FAQs
Is Gen Z really less active than earlier generations?
The evidence doesn’t answer that directly. The big WHO-led analysis shows most adolescents falling short of the recommendation and little improvement from 2001 to 2016. It didn’t compare Gen Z with earlier generations, so claims that this generation is uniquely inactive go further than the data.
How much exercise do I actually need?
Adults should aim for 150–300 minutes of moderate activity a week, or the vigorous equivalent. Teenagers should aim for an average of 60 minutes a day. If that sounds like a lot, start with what you can do and build up. The WHO says some activity is better than none.
Does walking count?
Yes. Brisk walking is moderate-intensity activity for most people, and walking is free, accessible and easy to build into the day.
Can I make up for sitting all day with one workout?
It helps, but it doesn’t fully cancel the effects of long unbroken sitting. Guidelines encourage reducing sedentary time as well as exercising, and short movement breaks through the day are a practical way to do that.
I’m not a sporty person. Where do I start?
Pick something that doesn’t feel like “exercise“: a daily walk with music, a dance video, cycling with a friend. Aim for regularity rather than intensity, and increase gradually.
Is screen time the main reason young people are inactive?
It’s probably a contributor, but research hasn’t proven it’s the main cause. Study load, transport habits, lack of safe spaces and social factors all play a role, so changing only screen habits may not be enough.
Conclusion
Most young people worldwide aren’t reaching the recommended level of activity, and the picture hasn’t improved much in recent years. The causes are mixed: screens, study pressure, easier transport and, for some, limited safe places to move. That’s why a lack of willpower is rarely the whole story.
You don’t need a gym membership or an hour-long routine to start. Try breaking up long sitting with a short walk, and choose one activity you actually enjoy this week. Build from there at your own pace.