An irregular or inadequate sleep routine may affect heart and brain health. Learn which sleep habits can increase health risks and how to improve your nightly routine.
Many people think of sleep simply as a time to rest and recharge. But when you sleep, how consistently you sleep, and how well you sleep can all matter for your long-term health.
One commonly overlooked mistake is having an inconsistent sleep schedule—staying up very late on some nights, sleeping much earlier on others, or constantly changing your wake-up time. Research has linked irregular sleep patterns with cardiovascular risk, while the American Heart Association emphasizes that healthy sleep is an important part of both heart and brain health.
Why irregular sleep may matter
Your body follows an internal circadian rhythm that helps regulate sleep, hormones, metabolism, blood pressure, and other processes. Constantly disrupting this rhythm may affect cardiovascular health and other aspects of well-being.
The American Heart Association recommends that most adults aim for 7–9 hours of sleep each night, while also maintaining consistent sleep and wake times.
Poor or insufficient sleep has been associated with several cardiovascular risk factors, including high blood pressure, obesity, diabetes and inflammation.
Your brain needs quality sleep, too
Sleep isn’t just about avoiding daytime tiredness. Disturbed sleep has been associated with poorer brain health, including stroke risk and cognitive problems. The AHA notes associations between sleep disorders and outcomes involving cerebrovascular disease and cognition.
That’s why repeatedly sacrificing sleep for work, entertainment, late-night scrolling, or an irregular schedule may be more consequential than it feels in the moment.
Another warning sign: loud snoring
If someone regularly snores loudly, gasps during sleep, or appears to stop breathing, the problem may be sleep apnea rather than ordinary snoring.
Untreated sleep apnea can repeatedly lower oxygen levels during sleep and is associated with increased risks of high blood pressure, heart attack and stroke.
Simple ways to improve your sleep
- Aim for 7–9 hours of sleep.
- Try to go to bed and wake up at roughly the same times every day.
- Keep your bedroom dark, quiet and comfortable.
- Avoid making late-night screen time a regular habit.
- Don’t rely on sleeping much longer on weekends to compensate for chronic weekday sleep deprivation.
- If you frequently wake up gasping, snore loudly, or remain exhausted despite getting enough hours, talk with a healthcare professional about possible sleep apnea.
Bottom line: One late night isn’t likely to determine your heart or brain health. The bigger concern is a persistent pattern of insufficient, fragmented, or highly irregular sleep. Making sleep more consistent is a simple habit that can support both cardiovascular and brain health.