Screen Time or an Hour of Movement: What the Guidelines Really Say and Where Karate Fits

Many parents in Kartal and Yakacık know the evening pattern: homework ends, a screen goes on, and the negotiation over five more minutes begins. Banning screens outright is rarely realistic, and saying nothing does not sit well either. The official guidance is a calmer place to start than the headlines.

What the WHO recommends

In 2020 the World Health Organization published new guidelines on physical activity and sedentary behaviour, summarised by Bull and colleagues in the British Journal of Sports Medicine. For children and teenagers aged 5 to 17, the core advice is short:

• An average of at least 60 minutes a day of moderate-to-vigorous physical activity across the week, mostly aerobic.
• Vigorous activity, and activity that strengthens muscles and bones, on at least 3 days a week.
• Less time sitting still, particularly less recreational screen time.

Two details matter. The key word is average: a long Sunday afternoon at the park can balance a quieter Wednesday. And the screen advice is a strong recommendation resting on low-certainty evidence. The WHO panel found too little evidence to set a number of hours, so it asks families to limit recreational screens without giving a precise cap.

What the Turkish Ministry of Health adds

The Ministry of Health's Türkiye Physical Activity Guide sets the same 60-minute daily target for school-age children, with vigorous activity at least three times a week. On screens it goes one step further: for children over 5, total screen time should not exceed 2 hours a day.

That number makes a useful anchor for a family rule. Note that it covers screen time in total, so if homework is done on a tablet, agree at home how that counts before it turns into a nightly negotiation.

The hour of movement is the part most children miss

It is tempting to frame this as screens against sport, but the target most children miss is the hour of movement. The WHO's 2024 fact sheet reports that worldwide 81 percent of adolescents aged 11 to 17 do not meet its activity guidelines, girls (85 percent) more often than boys (78 percent).

Among the benefits the WHO lists for active children are better fitness, heart, metabolic and bone health, fewer depressive symptoms and less body fat. A 2019 overview of the research by Biddle and colleagues judged that the strongest evidence of a direct benefit is for children's thinking skills, while evidence that activity raises self-esteem was lacking. For parents worried about schoolwork, a 2016 systematic summary by Donnelly and colleagues for the American College of Sports Medicine found no sign that time spent being active harms children's thinking or school achievement.

So the goal is not a screen-free child. It is a week with enough movement in it, and screens kept to a sensible share of what is left.

Where two karate classes fit

For kids' karate in Kartal, the numbers are simple. At Kartal Karate Academy the karate class for all ages runs on Tuesday and Saturday, 18:00–19:00, at Yakacık Spor Kulübü, and children can join from age 5. That is about 2 of the roughly 7 hours a week the WHO has in mind.

Karate training, with its stances, kicks, repeated kata and partner drills, can supply some of the vigorous, muscle- and bone-strengthening work the guidelines ask for on three days a week. Honestly, though, not every minute of a class is vigorous; there is explanation and waiting for your turn. Two classes cannot carry the week alone, and neither the WHO nor the Ministry recommends karate in particular; any activity counts. Karate-specific research is also thin: a 2026 scoping study by Torzsa and colleagues concluded that it is too early to call karate programmes proven for children's behaviour or thinking skills.

If your child would rather swim, play football or ride a bike, choose that. A sport your child enjoys and keeps going to will add more movement than one picked for them.

Family rules that tend to work

• Agree the rules together at a calm moment, not in the middle of a battle over a tablet.
• Treat the Ministry's 2 hours as a ceiling for games, videos and social media on school days, not an allowance to use up.
• Movement first on free afternoons: an hour at the park, in the street or on a bike, then screens.
• Keep class days light on screens. On Tuesday and Saturday the class is the evening's main event.
• Set a fixed evening end time for screens, and charge phones and tablets overnight in the living room, not the bedroom.
• Replace, do not just remove: a walk, a ball game or a job done together lasts longer than an empty ban.
• Apply the rules to adults too. Asking a child to put the phone down is easier when yours is already down.
• For one week, count instead of guessing: how long screens are really on, and how much your child really moves.

When to ask for help

If screen use keeps causing conflict at home, or you are worried about your child's attention, mood or sleep, talk to your child's doctor or the school counselling service first. A karate class can be a healthy part of the week, but it is not a treatment for anything.

Come and watch before you decide

Our guide for parents at karatekartal.fit/en/karate-benefits-for-children explains what karate can and cannot do for children, and the research behind it. You are welcome to watch a whole class from the side of the mat before you decide, and the first class is free. When you are ready, you can register at karatekartal.fit/en/register.

Sources

• Bull FC et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine 54:1451-1462. doi.org/10.1136/bjsports-2020-102955
• T.C. Sağlık Bakanlığı Halk Sağlığı Genel Müdürlüğü (2014). Türkiye Fiziksel Aktivite Rehberi, 2nd edition. Ankara.
• World Health Organization (2024). Physical activity. Fact sheet, 26 June 2024.
• Biddle SJH et al. (2019). Physical activity and mental health in children and adolescents: An updated review of reviews and an analysis of causality. Psychology of Sport and Exercise 42:146-155. doi.org/10.1016/j.psychsport.2018.08.011
• Donnelly JE et al. (2016). Physical Activity, Fitness, Cognitive Function, and Academic Achievement in Children: A Systematic Review. Medicine and Science in Sports and Exercise 48:1197-1222. doi.org/10.1249/MSS.0000000000000901
• Torzsa T et al. (2026). Karate interventions in children and adolescents: a scoping review of psychosocial and cognitive outcomes. Frontiers in Sports and Active Living 8:1840595. doi.org/10.3389/fspor.2026.1840595