Falling Asleep With the TV On? It Could Be Hurting Your Heart

Most people know that healthy eating and regular exercise are important for protecting the heart. But cardiologists say there is another factor that matters just as much: high quality sleep.

According to experts, nighttime habits can significantly affect sleep quality and, in turn, the health of the cardiovascular system.

Cheng-Han Chen, a cardiologist and medical director of the structural heart program at Saddleback MemorialCare Medical Center, explains that the body performs important recovery processes during sleep.

“During sleep, the body restores the cardiovascular system by lowering blood pressure, reducing stress hormones and inflammation, and helping repair blood vessels,” he says.

Why Screens Before Bed Are a Problem

One of the biggest nighttime habits experts warn about is screen use before sleep.

Phones, tablets, televisions, and computers emit blue light, which can interfere with the body’s natural sleep cycle.

According to Nadeem Geloo, blue light suppresses the release of melatonin, the hormone that helps the body prepare for sleep. As a result, the brain continues acting as though it is still daytime, making it harder to fully relax and fall asleep naturally.

Stressful Shows Can Affect the Heart

Experts also warn that the content people watch before bed matters as well.

Watching stressful, frightening, or emotionally intense programs late at night may trigger the release of stress hormones such as adrenaline. According to Dr. Chen, this can temporarily increase heart rate and blood pressure, placing additional stress on the cardiovascular system before sleep.

Over time, repeated poor sleep and ongoing nighttime stress may contribute to long term health problems.

The Link Between Sleep and Heart Health

Research continues to show a strong connection between sleep quality and cardiovascular health.

Studies, including a scientific review published in the journal Sleep Medicine X, have linked insufficient sleep to increased blood pressure and a higher risk of heart disease.

Because of this, experts recommend turning off screens at least one hour before bedtime to allow the body and brain time to relax naturally.

Instead of scrolling through phones or watching stressful programs, specialists suggest calming activities such as reading, deep breathing, gentle stretching, or quiet relaxation.

Experts also recommend maintaining a consistent sleep schedule and limiting alcohol consumption, both of which can help improve sleep quality and support overall heart health.