You probably know what it feels like to toss and turn, then drag yourself through the next day. Most of us put it down to coffee, stress or a phone screen in bed. Few people think of it as a heart problem.
A 2021 scientific statement from the American Heart Association, published in the journal Hypertension, concluded that short and disrupted sleep is an independent risk factor for high blood pressure.
In other words, poor sleep pushes blood pressure up on its own, not only through diet, weight or inactivity.
And it is not only about counting hours. In a 2018 study of 323 women published in the Journal of the American Heart Association, mild sleep problems were linked to higher blood pressure and signs of blood vessel inflammation.
Also read: They couldn't take chemo. Two drugs just cut their death risk 42%.
That held true even when the women slept seven to nine hours a night.
Your body depends on a nightly blood pressure dip
Normal sleep comes with a built-in rest for the heart. Blood pressure falls by about 10 to 20 percent while you are asleep. That dip gives your blood vessels time to recover from the day.
When sleep is short or broken, the dip is smaller or disappears. The fight-or-flight system stays switched on. Hormones like adrenaline and cortisol stay higher, and the vessels never fully relax.
Over time the effect adds up. Reduced nightly dipping is one of the patterns the AHA reviewers flagged as a path from poor sleep to lasting high blood pressure.
Also read: A vitamin B5 relative eased psoriasis in 24 patients, and the clue was in cholesterol
Mild sleep problems also leave a mark
The Columbia University team behind the women's study looked beyond hours in bed. They also measured markers of inflammation in cells lining the blood vessels. Women with lighter sleep and trouble falling asleep showed more of these signs.
Inflamed vessels stiffen over years. Stiff vessels push blood pressure higher, which in turn raises the risk of heart attack and stroke.
Mild sleep issues were far more common in the study group than sleep apnea. That matters because the risk is not reserved for people with a formal sleep diagnosis.
What good sleep looks like for your heart
The American Academy of Sleep Medicine and the Sleep Research Society recommend at least seven hours of sleep a night for adults aged 18 to 60. Sleeping six hours or less is not enough to sustain long-term health, the panel said.
Also read: What happens to your cholesterol and heart when you cut out red meat
But hours alone do not tell the full story. A steady bedtime and uninterrupted sleep appear to count just as much as total time.
Lead author Brooke Aggarwal of Columbia has pointed out that even a one-hour swing in when you fall asleep from night to night may show up on the heart over time.
Anyone with ongoing high blood pressure and ongoing poor sleep should bring both to the same doctor's visit, not treat them as separate problems.
Also read: Expert reveals the best times to eat to boost your metabolism
Also read: FDA recalls more than 4.3 million toothpaste tubes over safety concerns
This article is made and published by Mie Hermansen, who may have used AI in the preparation.