Spending time outside at night can be a relaxing part of a routine, but air pollution and artificial light exposure in big cities may increase stroke risk. A new study published in the American Heart Association journal Stroke found that continuous exposure to bright, artificial light can increase the odds of developing conditions affecting blood flow to the brain by 43%, including clogged arteries and bleeding into the brain that can result in a stroke. The study also reported that artificial light exposure can decrease sleep, further increasing stroke risk. As societies modernize, artificial environmental factors are becoming more prevalent and significant.
The study involved more than 28,000 adults in China and found that those with the highest exposure to outdoor light in the evening had a 43% higher chance of cerebrovascular disease than those with the lowest exposure levels. People exposed to the most air pollution from burning fuel, dust, or smoke had up to a 50% higher odds of stroke, while those exposed to high levels of nitrogen oxide emissions faced a 31% greater risk. Air pollution can damage blood vessels, increase blood pressure, and disrupt heart function, all contributing to the risk of stroke.
Experts note that the study has limitations, as it could not prove causality due to its observational nature and the fact that participants were from only one city in China. Despite this, it still provides valuable information on the potential impact of artificial light exposure and air pollution on stroke risk. To lower your risk of stroke, it is recommended to limit light exposure to daytime, wear protective gear when outside at night, avoid screens before bed, and focus on overall health by exercising, following a healthy diet, and getting enough sleep. These basic lifestyle factors can help reduce the risk of stroke regardless of where you live.
Cardiologists emphasize the importance of taking steps to protect yourself from the potential risks associated with artificial light exposure and air pollution. Ways to reduce your risk include getting sunlight during the day to regulate your melatonin production and sleep, wearing protective gear like tinted glasses and face coverings outdoors, and using black-out shades indoors. In addition to these precautions, focusing on maintaining a healthy lifestyle through exercise, diet, and sleep can help lower your risk of stroke. Overall, being aware of these environmental factors and taking steps to mitigate their impact can help protect your heart health in the long run.
