Helles Licht in der Nacht ist mit einem erhöhten Risiko für Herzerkrankungen verbunden. Untersuchungen ergaben, dass die Teilnehmer der Studie, die die hellsten Nächte hatten, ein um 32 % höheres Risiko für koronare Herzkrankheit und ein um 56 % höheres Risiko für einen Herzinfarkt hatten. Darüber hinaus hatten sie ein um 30 % höheres Schlaganfallrisiko.
https://www.mcknights.com/news/exposure-to-bright-lights-at-night-linked-to-increased-risk-of-heart-disease-study-finds/
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Light at night causes disruption to the body’s circadian rhythm, which in turn can cause hypercoagulability, an elevated heart rate, elevated blood pressure, inflammation, and reduced cardiac vagal modulation. Previous evidence suggests that rotating shift workers, such as nurses or caregivers who work the night shift, are most susceptible to long-term circadian disruption.
Researchers from Flinders University’s FHMRI Sleep Health analyzed cardiovascular disease records from the UK Biobank for 88,905 individuals across 9.5 years from June 2013 to November 2022. The mean time between light tracking and the final follow-up was 7.9 years. Data analysis occurred from September 2024 to July 2025. A wrist-worn light sensor tracked about 13 million hours of personal day and night light exposure and then grouped these into 24-hour light exposure profiles for each participant.
Results showed that participants who had the brightest nights had a 32% higher risk of coronary artery disease and a 56% higher risk of a heart attack. Additionally, they had a 30% higher risk of stroke. The risks remained high even after accounting for other factors like exercise, diet, sleep habits and genetics. Authors note that scrolling on a phone and leaving TV and bedroom lights on before sleep could potentially expose someone to harmful levels of light.
“To our knowledge, this is the first study of personal light exposure patterns and incident cardiovascular diseases, indicating night light as an important new risk factor,” said the authors. “Our findings demonstrate that, additional to current recommendations, avoiding night light is a promising target for preventing cardiovascular diseases.”
https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2840489
I cant wait to be able to tell the world „Sorry, cancer and pediatric and ICU patients: this is unhealthy so medical test processing stops from 8pm to 5am.“
I might get my weekends back, too.