Is a consistent sleep schedule important to heart health?

Maintaining a regular sleep schedule may play a significant role in protecting heart health, suggests preliminary research to be unveiled at the upcoming American Heart Association's Scientific Sessions 2026 in Chicago. Contrary to the focus on achieving a full eight hours of sleep each night, neuroscientist Nguyen Minh Tuan Viet, the lead researcher from Boston Children's Hospital and Harvard Medical School, stresses that a consistent sleep pattern - consistent bedtimes, wake times, and sleep duration - could help safeguard one's heart and blood vessels.

The study analyzed sleep data from over 10,000 adults who wore activity-tracking devices as part of the NIH's All of Us Research Program. The findings reveal that irregular sleep patterns were linked to a wider range of heart conditions than anticipated. Viet explains that sleep irregularity often results from irregular weekend sleep patterns, such as staying up later on Friday nights or shift work.

While the quality of sleep may be uncontrollable at times, regular bedtimes and waking up at the same time every morning are aspects that individuals can manage. The study findings should be approached with caution, acknowledges American Heart Association volunteer expert Marie-Pierre St-Onge, who chaired the association's 2025 scientific statement on Multidimensional Sleep Health: Definitions and Implications for Cardiometabolic Health.

Although the research adds to the body of evidence on sleep duration, it remains unclear if sleep regularity has a direct causal impact on cardiovascular disease risk. The study should inspire scientists to further investigate the relationship between sleep regularity and heart disease, potentially leading to similar recommendations for regularity as those for sleep duration.

Adopting stable sleep schedules could be a helpful tool in enhancing sleep duration, as noted in the abstract.