Night owl habits linked to higher heart health risks
A large study has found that people who are more active late at night — when most of the population is winding down or already asleep — have poorer overall heart health than the average person. Research fellow Sina Kianersi of Brigham and Women's Hospital and Harvard Medical School, who led the study, noted the issue stems from a mismatch between one's internal clock and typical daily schedules, making it harder to follow heart-healthy behaviors.
By Source Reporters Newsdesk
Thu, 27 August 2026 · 1 min read
A large study has found that people who are more active late at night — when most of the population is winding down or already asleep — have poorer overall heart health than the average person. Research fellow Sina Kianersi of Brigham and Women's Hospital and Harvard Medical School, who led the study, noted the issue stems from a mismatch between one's internal clock and typical daily schedules, making it harder to follow heart-healthy behaviors.
Heart disease remains the leading cause of death in the United States, with the American Heart Association identifying eight key factors for better heart health including being physically active, avoiding tobacco, getting sufficient sleep, maintaining a healthy diet, and controlling blood pressure, cholesterol, blood sugar, and weight.
The study's findings highlight that circadian rhythm variations — our master biological clock regulating 24-hour cycles in organ systems — can influence heart rate, blood pressure, stress hormones and metabolism. While night owls may have higher rates of smoking and less physical activity, researchers emphasize the health risk is modifiable through lifestyle adjustments and better alignment with natural daily rhythms.
Kianersi, who describes himself as a night owl, suggested that understanding and adapting to individual circadian preferences could help mitigate risks, noting the challenge is manageable with the right behavioral strategies and awareness of personal timing patterns.
**Sources:** Associated Press
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