A new large-scale clinical study has found that regular night-time snoring may be a warning sign of elevated blood pressure and undiagnosed hypertension, particularly in overweight middle-aged men.
This is the first study of its kind to use continuous, at-home sleep tracking technology over multiple nights, providing strong objective evidence of the link between habitual snoring and cardiovascular risk.
“For the first time, we can objectively say that there is a significant connection between regular nighttime snoring and high blood pressure,” said Dr. Bastien Lechat, lead author and researcher at the College of Medicine and Public Health, Flinders University. “We found that 15 per cent of all participants snored for more than 20 per cent of the night on average, and this regular nightly snoring is associated with elevated blood pressure and uncontrolled hypertension.”
The research was conducted by Flinders University’s sleep health team and published in Nature Digital Medicine.
Using a combination of under-mattress sleep sensors and FDA-registered home blood pressure monitors, researchers monitored over 12,000 individuals globally over a nine-month period.
Snoring was measured against total sleep duration, while blood pressure was tracked for both controlled and uncontrolled cases of hypertension.
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Snoring Doubles the Risk of Uncontrolled Hypertension
Results showed that individuals who snored regularly had nearly double the risk of having uncontrolled hypertension compared to non-snorers.
That risk nearly doubled again for participants who both snored and had sleep apnoea, a disorder where breathing stops intermittently during sleep.
“We observed that in those who snore regularly the risk of having uncontrolled hypertension was almost double,” said Professor Danny Eckert, Director of Sleep Health at Flinders University and senior author of the study.
“This risk almost doubled again in people who snored regularly and had sleep apnoea versus those who did not snore regularly.”
These findings highlight snoring not just as a nuisance or sleep quality issue, but as a potential cardiovascular risk marker that should not be ignored.
The connection between snoring and hypertension lies in the fragmented, low-quality sleep caused by airway obstruction, which can trigger sustained physiological stress responses overnight.
Over time, this contributes to the development of persistent high blood pressure, which significantly increases the risk of stroke, heart attack, kidney damage, and cognitive decline.
Snoring and Sleep Apnoea – Overlapping but Distinct Threats
While snoring and sleep apnoea frequently co-occur, the study’s authors emphasize that even isolated snoring can serve as a red flag for clinicians.
The research presents compelling evidence that snoring alone—without apnoea—still carries a heightened risk of hypertension, warranting early clinical attention.
This builds on existing literature linking poor sleep quality with systemic inflammation, insulin resistance, and elevated nighttime blood pressure spikes.
The study confirms that snoring should be recognized as a modifiable risk factor in both primary care and cardiology contexts.
How to Identify and Address Nighttime Snoring as a Health Concern
If you or a partner notice frequent, loud snoring accompanied by tiredness, morning headaches, or choking during sleep, these may indicate an underlying issue requiring further investigation.
Healthcare professionals can refer patients for a home sleep study or polysomnography, which helps confirm the presence of sleep-disordered breathing patterns.
“These results emphasise the significance of considering snoring as a factor in healthcare and treatment for sleep-related issues, especially in the context of managing hypertension,” added Dr. Lechat.
What You Can Do: NHS Snoring and Sleep Health Advice
The UK NHS provides actionable recommendations for people looking to reduce snoring episodes and improve sleep health.
Do this to reduce snoring risk:
- Try to lose weight if overweight.
- Sleep on your side using a wedge or posture pillow.
- Encourage your partner to wear earplugs if snoring is disruptive.
Avoid the following:
- Do not smoke.
- Avoid excessive alcohol.
- Do not take sleeping pills, as they can relax airway muscles and worsen snoring.
In cases of suspected sleep apnoea or persistent snoring, patients are advised to consult their GP or a sleep specialist to explore therapeutic interventions.
“The findings of this study pave the way to further investigate whether therapeutic interventions directed toward snoring can reduce hypertension and reduce the risks associated with it,” Dr. Lechat concluded.
Conclusion: Snoring Is a Clinically Relevant Warning Sign for Hypertension
This groundbreaking study reveals that snoring is not just a sleep issue—it is a measurable indicator of elevated hypertension risk, especially in middle-aged overweight men.
Healthcare providers are now urged to include snoring assessments as part of cardiovascular risk evaluation, and to promote early intervention when necessary.
By identifying snoring early and addressing it through lifestyle or medical interventions, patients may be able to prevent the long-term consequences of uncontrolled high blood pressure, including stroke and heart failure.
