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Study Links Bedroom Light During Sleep to Heart Changes
Researchers found that sleeping in more than 3 lux of light was linked to thicker heart walls and weaker pumping in over 11,000 adults.
- On Wednesday, the European Heart Journal published a study linking bedroom light exposure of more than 3 lux to structural changes in the heart, including thickened left-ventricle walls indicating early cardiac dysfunction.
- Analyzing data from more than 11,000 Biobank participants, researchers wore wrist sensors for seven days to track nighttime light exposure. Shorter sleep duration accounts for 24% to 49% of the observed heart impact.
- Dr. Andrew Freeman, director of cardiovascular prevention and wellness at National Jewish Health in Denver, described the resulting heart muscle thickening and stiffening as cardiac "remodeling." He noted these changes often coincide with excess light exposure.
- Cautioning that wrist sensors may poorly proxy eye exposure, Karl Lawrence, a lecturer in the Institute of Pharmaceutical Science at King College London, noted that other factors like stress account for the remaining 51% of risk.
- Experts recommend maintaining bedroom darkness near 1 lux using blackout curtains or sleep masks to prevent heart disease. Clinicians increasingly view reducing nighttime light exposure as a potential preventative strategy for cardiovascular health.
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During a follow-up period of up to 10 years, the group most exposed to light during sleep showed a 29% higher risk of heart failure
·Los Angeles, United States
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Even the slightest amount of light at night can damage the heart muscle during sleep, increasing the risk of cardiovascular disease, CNN reports, citing a recent study published in the European Heart Journal.
·Budapest, Hungary
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Coverage Details
Total News Sources78
Leaning Left7Leaning Right3Center50Last UpdatedBias Distribution83% Center
Bias Distribution
- 83% of the sources are Center
83% Center
12%
C 83%
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