A growing body of research is raising concerns about the health risks of late-night lifestyles, with new findings suggesting that people who regularly stay up late may face a significantly higher risk of cardiovascular disease.
The study, published in the Journal of the American Heart Association, indicates that so-called night owls individuals who naturally prefer late sleep and wake times are more likely to experience poor heart health compared to early risers.
Large-scale study highlights increased risk
Researchers analyzed data from more than 322,000 participants in the UK Biobank, categorizing them based on their natural sleep patterns, or chronotypes morning, intermediate, and evening types.
The results were striking. Individuals with an evening chronotype were found to be:
- 79% more likely to have poor overall cardiovascular health
- 16% more likely to develop heart disease over nearly 14 years
- At increased risk of heart attack and stroke
The association was particularly strong among middle-aged and older adults, especially women.
Why late nights may harm the heart
Experts say the issue lies in the mismatch between the body’s internal clock and external daily schedules. When people stay up late but still need to wake early for work or responsibilities, it creates a chronic disruption of circadian rhythms.
This misalignment can lead to:
- Irregular sleep patterns
- Poor eating habits
- Reduced physical activity
- Increased stress on the body
Over time, these factors combine to elevate cardiovascular risk.
Lifestyle habits also play a role
The study found that night owls were more likely to engage in behaviors linked to poor heart health, including smoking, inactivity, and unhealthy diets.
Researchers assessed participants using the American Heart Association’s “Life’s Essential 8,” which includes factors such as sleep quality, physical activity, diet, blood pressure, and cholesterol levels.
Early risers show better outcomes
In contrast, individuals who identified as morning types had slightly better heart health, with about a 5% lower likelihood of poor cardiovascular outcomes compared to those with average sleep patterns.
Steps night owls can take
Despite the risks, experts emphasize that being a night owl does not automatically lead to heart disease. Instead, focusing on manageable lifestyle changes can significantly reduce risk.
Recommended steps include:
- Maintaining consistent sleep and wake times
- Getting sufficient sleep each night
- Increasing exposure to morning sunlight
- Engaging in regular physical activity
- Monitoring blood pressure, cholesterol, and blood sugar
- Avoiding smoking
More research still needed
While the findings highlight a strong link between late sleep patterns and heart health, researchers note that the study is observational and does not prove direct causation. Further studies are needed, particularly among younger populations.
A wake-up call for late sleepers
Health experts say the takeaway is clear: while your natural sleep preference may be difficult to change, your daily habits are not. Aligning lifestyle choices with better sleep hygiene and heart-healthy behaviors could make a meaningful difference over time.
