Inconsistent Sleep in Your 40s Linked to Double the Heart Attack Risk Later in Life
New research shows that people with inconsistent sleep schedules in their 40s face roughly double the risk of a heart attack later in life. The study adds to a growing body of evidence connecting sleep regularity, not just duration, to long-term cardiovascular health.
People who have inconsistent sleep schedules in their 40s face roughly double the risk of a heart attack later in life, according to new research highlighted by Science Daily in May 2026.
The study adds to a growing body of evidence that sleep regularity matters as much as sleep duration for long-term health. Most guidelines focus on getting seven to nine hours per night, but researchers say going to bed and waking up at different times each day creates its own set of risks.
Irregular sleep disrupts the body's circadian rhythm, which regulates hormones, metabolism, and cardiovascular function. Over time, that disruption can contribute to inflammation, elevated blood pressure, and other factors linked to heart disease.
The findings are consistent with earlier research connecting poor sleep to obesity, diabetes, and cognitive decline. Chronic sleep deprivation also affects hunger hormones, increasing appetite and making weight management harder.
Sleep specialists recommend setting a consistent bedtime and wake time, even on weekends. Keeping the bedroom cool, dark, and quiet helps. Avoiding screens for at least an hour before bed reduces exposure to blue light, which can delay the onset of sleep.
For people who consistently feel exhausted despite adequate sleep time, doctors recommend consulting a sleep specialist. Undiagnosed sleep disorders such as sleep apnea are common and treatable.
The research comes during a period of growing attention to sleep as a core component of preventive health. Wearable devices that track sleep stages and consistency have become widely used tools for monitoring sleep quality.
