Screen time and sleep: what the research actually shows

The average Norwegian adult now spends 4.2 hours a day on a smartphone, according to 2025 figures from Statistics Norway (SSB). A growing body of peer-reviewed research says a significant chunk of that time, specifically the hour before sleep, is doing quantifiable damage to sleep quality. Not vague, not contested. Measurable.

This matters in Oslo right now for a specific reason: July. The city sits at 59 degrees north latitude, which means sunset on 3 July arrives around 22:41, and ambient light never fully disappears. Residents are already fighting a biological battle against melatonin suppression from natural light. Layering blue-light exposure from screens on top of a Norwegian summer evening is, sleep researchers argue, a double disruption that many people in this city are sleepwalking through.

What the science actually says

Blue light, the short-wavelength light emitted by phone and laptop screens, suppresses melatonin production by signalling to the suprachiasmatic nucleus in the brain that it is still daytime. A 2023 study published in Nature and Science of Sleep found that 90 minutes of evening screen use delayed melatonin onset by an average of 47 minutes in subjects aged 18 to 45. That is not a minor inconvenience. Pushed back melatonin means delayed sleep onset, reduced slow-wave deep sleep, and earlier cortisol surges in the morning, which is what makes people feel groggy even after a nominally full night in bed.

The hormone conversation has been getting louder in 2026. Clinicians across Scandinavia have noted rising patient queries about melatonin supplements, which are available over the counter in Norway in doses up to 0.5 mg. But researchers are cautious. Supplementing melatonin without addressing the source of suppression, the screen, is, as one way of putting it, bailing a boat without plugging the hole. The Norwegian Institute of Public Health (Folkehelseinstituttet) published guidance in March 2026 recommending screen-free windows of at least 60 minutes before bed as a first-line behavioural intervention, before any pharmaceutical support is considered.

Oslo's wellness infrastructure is already responding

At Sats Elixia's Grünerløkka location on Thorvald Meyers gate, sleep hygiene has become a formal component of the gym's coaching programmes since January 2026. Members tracking their recovery through the club's app can now log screen time data alongside sleep scores, with coaches flagging correlations in monthly check-ins. It is a small but telling shift: a commercial fitness operator treating sleep not as a background variable but as a training outcome.

Further west, the Oslo University Hospital's (Oslo universitetssykehus) sleep disorder unit at Ullevål has seen a 22 percent increase in referrals for non-apnea insomnia complaints since 2023. Clinicians there have begun integrating Cognitive Behavioural Therapy for Insomnia, CBT-I, as a standard protocol. CBT-I explicitly targets pre-bed screen habits, sleep scheduling and the anxiety loop that develops when people reach for their phones after a restless night, which only perpetuates the cycle.

Praktis, the Oslo-based digital health platform operating primarily across Frogner and St. Hanshaugen, began offering structured sleep coaching modules in April 2026. A six-week programme runs at 890 kroner and centres on what the platform calls environmental sleep architecture, light management, temperature, and screen scheduling. They report a waitlist of around 200 users as of June.

The practical picture emerging from all of this is fairly consistent. Researchers, clinicians and wellness practitioners are converging on the same set of behaviours: stop screens 60 to 90 minutes before your target sleep time, use warm-spectrum lighting in the evening hours, keep phones out of the bedroom entirely if possible, and treat morning phone-checking as almost as damaging as night-time scrolling, because it front-loads cortisol and resets your alertness baseline before your body is ready.

None of this requires expensive intervention. It requires friction. Making the phone slightly harder to reach at 23:00 on a bright Oslo summer evening is, the research suggests, one of the more impactful health decisions a person in this city can make this month. As always, speak with a Norwegian fastlege or specialist if persistent sleep difficulties are affecting your daily function.