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Weekend Lie-Ins May Lower High Blood Pressure Risk, Study Finds — AI-generated representative image. A person sleeping peacefully during a weekend lie-in, illustrating research on catch-up sleep and blood pressure.

Editorial Team

Catch-up sleep on weekends could benefit cardiovascular health, but experts warn against excessive irregularity in sleep patterns.

Sleeping an extra hour or two on weekends may reduce the risk of high blood pressure, according to a seven-year study of more than 40,000 adults in South Korea presented at the European Society of Cardiology's annual congress in Munich, Germany, on Sunday.

The findings challenge the long-standing medical view that people should keep consistent bedtimes and wake-up times throughout the week, suggesting that moderate weekend catch-up sleep can help the body recover from weekday sleep loss.

The research carries broad public health significance because hypertension affects 1.4 billion adults aged 30 to 79 worldwide, or 33 percent of that age group, according to the World Health Organization. High blood pressure is a major cause of premature death globally, making practical lifestyle findings about sleep potentially valuable for large populations.

The study also reassures people who feel guilty about sleeping longer on weekends, suggesting a moderate lie-in may serve a genuine health purpose rather than reflecting laziness.

Key Findings of the Study

The research, based on data from the Korea National Health and Nutrition Examination Survey collected from 2016 to 2023, examined how many extra hours participants slept on weekends compared with weekdays. Overall, weekend catch-up sleep was associated with a 6 percent decrease in the chances of high blood pressure.

The benefit was strongest at a moderate level. Researchers identified an optimal increase of about one hour and 37 minutes of extra sleep, which could reduce the chances of hypertension by 9 percent. The association was slightly larger for physically inactive people, who saw a 6.9 percent decrease in their chances of hypertension.

The findings have not yet been published in a peer-reviewed journal, meaning they should be treated as preliminary until independently reviewed.

How This Compares With Earlier Research

The new study builds on recent work that also linked weekend catch-up sleep to improved heart health. At the 2024 European Society of Cardiology congress in London, researchers presented a study of more than 90,000 individuals showing that people with the most weekend catch-up sleep had about a 20 percent lower risk of developing heart disease than those with the least.

For decades, medical consensus has held that too little sleep harms cardiovascular health, that seven to nine hours a night is generally optimal for adults, and that regularly sleeping much more than that may sometimes signal an underlying health problem. Some scientists previously cautioned that weekend lie-ins could be harmful by disrupting the body's natural circadian rhythm, the roughly 24-hour biological clock that regulates sleep, hormone release and body temperature.

A 2019 study of 36 adults divided participants into three groups: one restricted to five hours of sleep nightly over nine nights, another restricted to five hours but allowed unrestricted weekend catch-up, and a third allowed nine hours nightly. Both restricted groups snacked more in the evening and experienced declining metabolic health. Those who slept more on weekends improved while sleeping longer, but the benefits disappeared once they returned to short sleep, leaving their overall metabolic health still worse than those who consistently slept more.

Researcher's Explanation and Caution

Nawon Lee from Korea University in Seoul, the study's author, explained that insufficient sleep places extra stress on the body, forcing the heart and blood vessels to work harder, which can raise blood pressure. She said people should not feel lazy or guilty about sleeping a little longer on weekends if they have not been able to get enough sleep during the week, describing it as the body's way of recovering from sleep loss.

However, Lee warned that when weekend catch-up sleep becomes excessive, the degree of sleep irregularity and circadian disruption may increase, which could offset the benefit. This aligns with the broader medical understanding that consistency remains important for long-term health.

What Comes Next

The study is currently presented as conference findings and has not yet undergone peer review, so its conclusions await independent scientific validation. Researchers will likely seek publication in a medical journal, after which the findings can be more firmly established within the broader evidence base on sleep and cardiovascular health.

Until then, the emerging message for the public is that a moderate weekend lie-in of one to two hours may offer heart benefits, while excessive irregularity in sleep patterns should still be avoided.