The body interprets that light as daytime and doesn't prepare for sleep.
Study shows 48.7% of schoolchildren have sleep difficulties from screen exposure, causing stress, poor concentration, and reduced academic performance. Blue light from screens suppresses melatonin production and creates constant mental alertness, making it harder to fall asleep and reducing sleep quality.
- 48.7% of schoolchildren report sleep difficulties from screen exposure
- Average daily screen time: nearly 4 hours
- 80% increased risk of sleep problems with excessive screen use
- Event held in La Palma del Condado, Huelva with over 1,000 attendees
- Copa COVAP reaches nearly 4,000 young athletes annually across Andalusia
Sports psychologists warn that excessive screen use increases sleep problems by 80% in children, with nearly half of schoolchildren experiencing sleep difficulties due to average daily exposure of four hours.
Nearly half of all schoolchildren are struggling to sleep, and researchers have traced the problem directly to their screens. A study from Peru's Catholic University of Santa María found that 48.7 percent of young students report sleep difficulties, with the average child spending almost four hours a day staring at devices. The connection is stark: excessive screen use raises the risk of sleep problems by eighty percent, according to findings that have caught the attention of Spain's sports psychology federation.
The mechanism is straightforward but relentless. When children use phones, tablets, and computers—especially in the hours before bed—their brains stay in a state of constant alert. The light pouring from these screens, particularly the blue wavelengths, suppresses melatonin, the hormone that tells the body it's time to rest. The stimulation from content and notifications makes it nearly impossible to mentally disconnect. The result is a child who lies awake longer, sleeps less deeply, and wakes more tired.
The consequences ripple through every part of a child's life. David Peris Delcampo, president of Spain's Federation of Sports Psychology, explains that poor sleep directly damages emotional balance, triggering irritability, stress, and fatigue. In young people, this interference extends to learning itself—memory formation, emotional regulation, and the ability to manage frustration all suffer when rest is inadequate. A child who hasn't slept well struggles to concentrate in class, performs worse in sports, and carries a baseline exhaustion that colors everything.
The Copa COVAP, an educational and sports initiative run by the Pedroches Valley Livestock Cooperative, partnered with the psychology federation to sound this alarm at their recent event in La Palma del Condado, Huelva, where more than a thousand people gathered. The organization used the occasion to teach families how to reclaim healthy habits. Nutritionists led sessions on managing screen time, while psychologists worked directly with children on what they called "discovering your digital superpower"—essentially, learning to use technology responsibly rather than being used by it.
The prescription is simple but requires discipline. Experts recommend disconnecting from all screens at least an hour before sleep. In that freed hour, families are encouraged to read together, listen to music, or simply talk. These activities calm the nervous system and allow the body to naturally prepare for rest. During sleep itself, the body performs essential work: generating new cells, releasing growth hormone, and restoring emotional equilibrium. Without adequate sleep, a child faces the next day depleted.
Peris Delcampo argues that teaching children about rest and self-care should be as fundamental as teaching them about nutrition or exercise. Sleep education should begin in childhood and become as automatic as brushing teeth. The Copa COVAP's thirteenth edition this year added new partners—including the Unicaja Foundation, the Andalusian Regional Government, and several corporate sponsors—to expand this message across the region. The initiative reaches nearly four thousand young athletes annually across Andalusia's eight provinces, using sports as a platform to promote broader health and wellbeing.
The stakes are clear. A generation growing up with constant access to screens faces a genuine health challenge: the more they use devices, the worse they sleep, and the worse they sleep, the harder everything becomes. Breaking that cycle requires not just individual willpower but family commitment and cultural change—treating sleep not as a luxury but as the foundation it actually is.
Notable Quotes
Sleep is one of the fundamental pillars for physical and mental recovery. When rest is insufficient or poor quality, emotional balance is disrupted and stress, irritability, and fatigue increase.— David Peris Delcampo, president of Spain's Federation of Sports Psychology
Education in rest and self-care should be part of healthy habits from childhood, just as nutrition and sports practice are.— David Peris Delcampo
The Hearth Conversation Another angle on the story
Why does the light from screens matter so much? Couldn't kids just close their eyes and fall asleep anyway?
The blue light actually suppresses melatonin production—it's a biological response, not a matter of willpower. The body interprets that light as daytime and doesn't prepare for sleep. It's not about trying harder; it's about the signal the body receives.
So if a child puts the phone down an hour before bed, that's enough to reverse the damage?
An hour gives the body time to shift gears, yes. But the real issue is the cumulative effect. These kids are averaging four hours of screen time daily. One hour of disconnection helps, but the underlying habit is the problem.
What happens to a child who's chronically sleep-deprived? Is it just tiredness?
It's much broader. Memory formation suffers, emotional regulation breaks down, and stress tolerance collapses. A sleep-deprived child gets frustrated more easily, concentrates worse, and performs worse academically and athletically. It's not just feeling tired—it's a cascade of cognitive and emotional effects.
Why is a sports organization the one raising this alarm?
Because they see it directly. Kids who don't sleep well perform worse in sports, show less resilience, and struggle with the mental side of competition. But more fundamentally, Copa COVAP is about health and values, not just winning. Sleep quality is a health issue.
Is there any way to make screens less harmful before bed?
The research suggests the problem isn't really fixable while using them. The stimulation itself—the content, the notifications, the light—keeps the brain alert. The only real solution is disconnection, not modification.
What would you tell a parent who says their child needs their phone for homework or safety?
That's a real tension. But the recommendation is specifically about the hour before sleep. Homework and communication can happen earlier. The boundary is about protecting that window when the body needs to transition to rest.