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A simple sleep mistake could increase heart disease risk
New York Post • • general
Key Points:
- A new study reveals that even low levels of nighttime light exposure (3 lux or more) in the bedroom can cause structural changes in the heart, specifically thickening of the left ventricle walls, which may impair heart function and increase cardiovascular risk.
- Left ventricular hypertrophy caused by light exposure during sleep is linked to serious heart conditions such as heart failure, arrhythmias, ischemic heart disease, and cardiac arrest.
- Experts recommend minimizing bedroom light exposure by using blackout curtains, warm-colored bedside lighting, covering standby LEDs on electronics, or wearing sleep masks to protect heart health.
- The potential mechanism behind these effects is disruption of the circadian rhythm by light penetrating the eyelids, which may induce chronic stress responses in the heart.
- Addressing light pollution through city planning measures like shielded fixtures and dimmable streetlights can also reduce environmental light exposure and its health impacts.
