Deep sleep in the dark: A simple way to protect your heart
[WCCO-TV, November 24, 2025]
Sleep is essential for good health—but not just any sleep. Deep sleep in a dark environment is key. New research shows that sleeping in bright conditions can increase your risk of heart disease by 56%.
Marc Newell, MD, a cardiologist with Allina Health Minneapolis Heart Institute, explains that light may prevent you from reaching deep sleep. When that happens, your heart rate and blood pressure don’t get the chance to drop, and your body misses the reset it needs to function well. Dr. Newell shared more details in his interview with WCCO-TV.
Marc Newell, MD, a cardiologist with Allina Health Minneapolis Heart Institute, explains that light may prevent you from reaching deep sleep. When that happens, your heart rate and blood pressure don’t get the chance to drop, and your body misses the reset it needs to function well. Dr. Newell shared more details in his interview with WCCO-TV.
Posted on November 24, 2025 in
Heart/Cardiovascular, Allina Health Minneapolis Heart Institute
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