New research suggests that how a person breathes during sleep may be as important to heart health as diet or exercise. A study published in the Journal of Molecular and Cellular Cardiology examined the link between obstructive sleep apnea and cardiovascular disease.
Obstructive sleep apnea is a condition in which breathing repeatedly stops and starts during sleep. The study found that disrupted sleep patterns do more than affect energy levels. They can also increase the risk of both sleep apnea and heart disease.
When breathing is compromised during sleep, the body responds with inflammation, oxidative stress, and changes in how cells sense and respond to oxygen. The study points to the circadian rhythm as a central factor in this process.
Patients with sleep apnea often show abnormal circadian patterns in key markers such as blood pressure, heart rate, melatonin production, and cortisol levels. The research found that intermittent drops in oxygen during sleep can alter the expression of core clock genes in heart and lung tissue within just a few hours.
The study suggests that chronotherapy, which aligns treatments with the body’s natural rhythms, may help reduce both sleep apnea and cardiovascular risks.
Sleep and cardiovascular health have been connected for years, but this research shows how deeply they are linked. The circadian rhythm, the body’s internal clock that regulates sleep-wake cycles, appears to be the missing link between breathing problems during sleep and heart disease.
Experts recommend several steps to support healthy nighttime breathing and circadian rhythms. These include keeping consistent sleep and wake times, even on weekends. Creating a cool, dark, and quiet bedroom environment can also promote deep, uninterrupted rest.
Some studies suggest that magnesium supplementation before bed may help with muscle relaxation, including the muscles in the airway. Managing evening stress through breathwork, gentle stretching, or meditation can prevent circadian disruption. Sleeping on the side rather than the back may help keep airways open during the night.
People who experience snoring, gasping, or suspect breathing issues during sleep should speak with a healthcare provider. The study underscores that heart health depends not only on what a person eats or how much they exercise, but also on how they breathe and sleep.
The research was published in the Journal of Molecular and Cellular Cardiology in 2026. It adds to a growing body of evidence that sleep quality and breathing patterns play a direct role in cardiovascular health. The findings highlight the importance of addressing sleep apnea not just for better rest, but for long-term heart function.
