wellness
Zurich Study Links Evening Screen Time to Shorter Sleep Cycles
Studies tie evening device use directly to shorter sleep cycles among Zurich adults.
How we reported this
A University of Zurich analysis released last month found that adults who kept phones or tablets active past 10pm lost an average of 42 minutes of total sleep time per night compared with those who switched off earlier.
The finding arrives as Swiss health authorities track rising reports of fatigue linked to work-from-home habits that spill into bedrooms. Zurich's long summer daylight hours already compress evening wind-down periods, and many residents now extend that window with scrolling on trams or benches along the Seepromenade.
Local routines under the microscope
Walkers finishing Uetliberg summit hikes before dusk often return to flats in Wiedikon still checking messages. The city's public fitness programme at Bürkliplatz offers free evening yoga sessions that end at 8pm, yet participants frequently report checking work email on the short walk home. Staff at the University Hospital Zurich sleep clinic note a steady rise in referrals from the Kreis 1 district, where narrow streets and dense apartment blocks make it harder to escape blue light at night.
Researchers tracked 1,200 participants aged 25 to 55 through wearable devices over eight weeks in 2025. Those who reduced screen exposure after 9pm gained 19 minutes of deep sleep on average, with the largest gains among people living within 500 metres of Lake Zurich who combined the change with a short lakeside walk.
Practical steps that fit Zurich schedules
Residents can start by setting device greyscale mode at 9pm and leaving chargers outside the bedroom, a step that costs nothing. The University of Zurich offers a free four-week online module on sleep hygiene that includes local examples such as replacing late tram scrolling with a 15-minute loop around Sechseläutenplatz. Those seeking in-person support can book a CHF 45 consultation at the hospital's outpatient clinic on Rämistrasse, where clinicians review individual device logs rather than generic advice.
Early results from the same cohort show that consistent limits produce measurable shifts within 10 days, giving Zurich workers a concrete way to protect recovery time before the next alpine training session or lakeside run.