06/30/2026
What does poor sleep do?
Most people recognize the importance of sleep for energy, mood, and concentration, but fewer realize that poor sleep can also have a significant impact on heart health. Growing research has shown that chronic sleep deprivation and untreated sleep-related breathing disorders are closely linked to an increased risk of cardiovascular disease.
During healthy sleep, the body undergoes critical restorative processes. Blood pressure naturally decreases, heart rate slows, and the cardiovascular system gets an opportunity to recover from the demands of the day. When sleep is fragmented or insufficient, these restorative mechanisms are disrupted.
Poor sleep can contribute to elevated blood pressure, increased inflammation, impaired glucose metabolism, and heightened stress hormone production. Over time, these changes can place added strain on the heart and blood vessels, increasing the risk of conditions such as hypertension, coronary artery disease, heart attack, stroke, and heart failure.
Sleep-related breathing disorders can be particularly concerning. Repeated interruptions in breathing reduce oxygen levels and trigger frequent awakenings throughout the night. These events activate the body's stress response, causing spikes in blood pressure and heart rate that can contribute to long-term cardiovascular damage.
The relationship between sleep and heart health works both ways. Individuals with cardiovascular disease often experience sleep disturbances, while chronic poor sleep can worsen existing heart conditions. This creates a cycle that may negatively affect overall health and quality of life.
The good news is that identifying and addressing sleep concerns can be an important step toward improving cardiovascular health. By recognizing the connection between sleep and the heart, healthcare providers and patients can work together to support better breathing, better sleep, and better long-term wellness.
