Deep Sleep Paradox: Your Heart's Silent Enemy Revealed

Deep sleep acts as the primary recovery mechanism for the cardiovascular system. During the night, heart rate decreases and arterial blood pressure typically drops by 10-20%. Chronic lack of quality rest prevents this natural respite, which can damage vascular walls and increase the likelihood of hypertension. The mechanism of nocturnal blood pressure drop Sleep is an active phase of biological regulation. During deep sleep, levels of stress hormones—specifically cortisol and adrenaline—decrease. These substances maintain vascular tone during waking hours, keeping the heart in a high-intensity mode. According to cardiologist Valeriy Klimov, a stable circadian rhythm allows the body to manage inflammatory processes that otherwise negatively affect artery structure. When this cycle is disrupted, blood vessel walls remain under constant tension.