After School Is for Studying? An Honest Answer for Parents Who Think Sport Is Unnecessary

Many families in Kartal and Yakacık live by a simple rule: after school comes homework, and sport can wait. With weekly tests, a full timetable and the LGS waiting in eighth grade, evening hours can feel like the one part of the week a parent still controls. If that is you, we are not here to argue you out of caring about school.

This article asks a narrower question: does an hour of sport cost your child anything at school, and what does it give back? We teach karate, so weigh what we say accordingly. We will show what the research found, where it stops, and when saying no is the right call.

The arithmetic behind the rule

A week has a fixed number of evenings, and every hour on a mat looks like an hour taken from the desk. For a child already behind in maths, that sounds like a bad trade.

But an hour at the desk and an hour of real studying are not always the same thing, as any parent who has watched a tired child stare at a worksheet knows. So the useful question is not whether sport takes time, because it does, but whether that time shows up as lower results.

What the research says about sport and schoolwork

A 2008 summary of school studies by Trudeau and Shephard found that giving primary pupils up to an extra hour a day of physical activity, even when that hour came out of other lessons, did not lower their academic performance. They also noted that cutting PE to make room for more lessons did not raise grades.

A 2016 systematic overview by Donnelly and colleagues for the American College of Sports Medicine covered children aged 5 to 13. Most research supported benefits for thinking skills, the effect on school achievement was judged neutral, and there was no indication that more physical activity harms either.

A 2019 overview of 58 studies by Singh and colleagues, backed by an international expert panel, called the evidence that exercise programmes improve thinking skills and overall grades inconclusive. The most consistent benefits it found were in maths.

One caveat applies to all three: they mostly studied activity during the school day, so none is direct evidence about two club classes a week. The honest reading is that there is no sign a sensible amount of physical activity costs children their schoolwork. That is not the same as sport raising grades, a claim the research does not support.

The karate trial worth knowing about

In a trial by Pinto-Escalona and colleagues, published in 2024, 721 children aged 7 and 8 in 20 schools across five European countries had two hours of karate a week instead of their usual physical education for one school year.

The karate groups ended the year slightly ahead in teacher-reported grades, with an effect size of 0.16, which the authors call small. Those grades came from the children's own teachers, who may have known which classes did karate. The karate groups also had fewer conduct problems and better fitness and balance. There was no difference in attention or hyperactivity, emotional symptoms or problems with other children.

It is encouraging but limited: karate replaced a school lesson rather than being added after school, the children were young, and it is one study. So, plainly: karate does not guarantee better grades, and anyone who promises that is claiming more than the research shows. If your real worry is attention, talk to your child's doctor first; a karate class is not a treatment.

What a report card does not show

Some of what a class gives never appears on a report card, and the honest list is modest:

• An hour of movement after a day spent mostly sitting.
• Fitness and balance, which the trial above did measure.
• Practising one kata for weeks, being corrected in front of others, and trying again.
• Bowing in, waiting for a turn, and stopping the moment the sensei says stop.

We do not claim these habits carry over into homework; they are simply what a class asks of a child.

When saying no is the right call

Karate is not right for every family. Good reasons to say no, or not yet:

• If class nights keep pushing bedtime later, sleep comes first.
• If your child still dreads going after a fair try of six to eight weeks.
• If every weekday evening already has a course or tutoring, and your child comes home tired rather than restless.
• If it is the LGS year and your child wants that hour for revision. Some families keep one fixed hour of sport as a break; others pause for the final months. Both are reasonable.
• If your child would rather play football, swim or dance. The studies above cover physical activity in general, and a sport your child chose is more likely to last.

A fair way to decide

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. Saturday evening is not a school night, so Tuesday is the only school evening involved.

You are welcome to watch a whole class from the side of the mat before you decide. If you then try it, give it six to eight weeks and watch what happens at home: is homework still getting done, is bedtime holding, how does your child seem on Tuesday nights? That will tell you more about your own child than any study can.

Our guide for parents at karatekartal.fit/en/karate-benefits-for-children covers what karate can and cannot do for children. The first class is free; when you are ready, register at karatekartal.fit/en/register.

Sources

• Trudeau F, Shephard RJ (2008). Physical education, school physical activity, school sports and academic performance. International Journal of Behavioral Nutrition and Physical Activity 5:10. doi.org/10.1186/1479-5868-5-10
• 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
• Singh AS et al. (2019). Effects of physical activity interventions on cognitive and academic performance in children and adolescents: a novel combination of a systematic review and recommendations from an expert panel. British Journal of Sports Medicine 53:640-647. doi.org/10.1136/bjsports-2017-098136
• Pinto-Escalona T et al. (2024). Effects of a school-based karate intervention on academic achievement, psychosocial functioning, and physical fitness: A multi-country cluster randomized controlled trial. Journal of Sport and Health Science 13(1):90-98. doi.org/10.1016/j.jshs.2021.10.006