Healthy sleep is increasingly recognised as a critical factor in cardiometabolic health. A new scientific statement from the American Heart Association, published in Circulation: Cardiovascular Quality and Outcomes, underscores that sleep health is multidimensional. It encompasses more than just duration—it includes how long it takes to fall asleep, how refreshed one feels during the day, and overall satisfaction with sleep. Addressing these components holistically may help reduce the risk of heart disease, Type 2 diabetes, obesity, and related conditions.
The statement “Multidimensional Sleep Health: Definitions and Implications for Cardiometabolic Health,” outlines several key dimensions of sleep: duration, continuity, timing, satisfaction, regularity, and daytime functioning. Evidence indicates that suboptimal sleep—whether it is too short or too long—can increase the risk of high blood pressure, stroke, atrial fibrillation, and other cardiovascular problems. While most adults require 7 to 9 hours of sleep, the quality and consistency of that sleep are equally important in promoting long-term health.
Sleep continuity, or the ability to sleep without frequent interruptions, is critical. Sleep fragmentation, caused by factors such as insomnia or sleep apnoea, has been linked to increased risks of heart attacks, insulin resistance, and elevated blood pressure. Sleep timing also matters; individuals who routinely sleep after midnight are more likely to experience metabolic dysfunctions and weight gain than those who go to bed earlier. Yet research on optimal sleep timing remains relatively limited.
Other essential factors include sleep satisfaction and regularity. People who are dissatisfied with their sleep often face higher risks of stiff arteries, hypertension, and coronary heart disease. Irregular sleep schedules—such as varying sleep hours between workdays and weekends—can lead to “social jetlag” and are associated with obesity, diabetes, and inflammation. Studies show that consistent sleep patterns can significantly lower the risk of cardiovascular mortality.
Daytime functioning—how alert or sleepy a person feels—is another telling marker of sleep health. Excessive daytime sleepiness is associated with higher risks of stroke and heart disease and is often tied to obesity, depression, or sleep disorders. Sleep architecture, or the natural cycling through light and deep sleep stages, is also relevant. Deep (slow-wave) sleep disruption can impair glucose metabolism and increase insulin resistance, with lasting consequences for overall metabolic health.
The statement also highlights disparities in sleep health, particularly among racially and socioeconomically marginalised groups. Environmental factors like noise, light, neighbourhood safety, and structural inequities play significant roles. Addressing these differences is vital to promoting equitable health outcomes. The authors call for more research and improved clinical practice, encouraging healthcare providers to ask patients about their sleep habits and to document sleep-related concerns. As the science evolves, a more comprehensive approach to sleep could prove transformative in preventing cardiometabolic disease.
More information: Marie-Pierre St-Onge et al, Multidimensional Sleep Health: Definitions and Implications for Cardiometabolic Health: A Scientific Statement From the American Heart Association, Circulation Cardiovascular Quality and Outcomes. DOI: 10.1161/HCQ.0000000000000139
Journal information: Circulation Cardiovascular Quality and Outcomes Provided by American Heart Association
