Light in Your Bedroom at Night Linked to Hidden Heart Damage, Study Finds
Summary
A new study found that artificial light in bedrooms at night may harm the heart's structure and function. The research suggests that exposure to light at night could increase the risk of heart disease by disrupting sleep and the body’s natural clock.Key Facts
- Researchers from Tulane University studied over 11,000 people using wrist devices to measure nighttime light exposure.
- Higher exposure to light at night was linked to thicker heart walls and increased heart muscle mass.
- Changes in heart function affected both sides of the heart in those exposed to more nighttime light.
- Light at night may shorten and reduce the quality of sleep by disturbing the circadian rhythm, the body’s 24-hour internal clock.
- The study was published in the European Heart Journal on September 9.
- Cardiovascular diseases kill one person in the U.S. every 34 seconds.
- Light pollution comes from streetlights, screens, headlights, and other artificial sources.
- Disrupted circadian rhythms can prevent heart cells from repairing properly during sleep, leading to heart damage.
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