A recent study published in the European Heart Journal suggests that exposure to artificial light at night—such as sleeping with the lights on—may be linked to an increased risk of cardiovascular disease. Researchers tracked thousands of adults over time and found that, even after adjusting for factors like age, body weight, and lifestyle habits, individuals who slept with lights on or were exposed to ambient light at night had significantly higher risks of hypertension, arterial stiffness, and abnormal heart rate variability.Experts explain that light exposure suppresses melatonin production and disrupts the body’s circadian rhythm, which can impair the balance of the autonomic nervous system, leading to elevated blood pressure and irregular heart rhythms. Additionally, chronic nighttime light exposure may fragment sleep architecture and reduce deep sleep, indirectly harming cardiovascular health.The study highlights that even low-intensity light sources—such as nightlights or indicator LEDs on electronic devices—can have adverse effects. Therefore, researchers recommend keeping bedrooms as dark as possible during sleep, using blackout curtains or eye masks if necessary. These findings offer new scientific support for optimizing sleep environments as a strategy to prevent cardiovascular disease.
近日，一项发表于《欧洲心脏杂志》的研究指出，夜间暴露于人造光源（如开灯睡觉）可能与心血管疾病风险增加相关。研究人员对数千名成年人进行了长期追踪，发现即使在调整了年龄、体重、生活方式等因素后，习惯在睡眠时开灯或暴露于环境光的人群，其高血压、动脉硬化和心率变异性异常的风险显著更高。专家解释，光线会抑制褪黑激素的分泌，干扰人体生物钟，进而影响自主神经系统平衡，导致血压升高和心率紊乱。此外，长期光照还可能扰乱睡眠结构，降低深度睡眠比例，从而间接损害心血管健康。研究强调，即使微弱的光源（如夜灯、电子设备指示灯）也可能产生负面影响。因此，建议公众在睡眠时尽量保持卧室黑暗，必要时可使用遮光窗帘或佩戴眼罩。这一发现为改善睡眠环境、预防心血管疾病提供了新的科学依据。
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