Do Early Birds Have Healthier Hearts Than Night Owls?

Rise and Shine… or Burn the Midnight Oil?

When it comes to sleep, timing might matter more than you’d expect. The long-running debate around night owls and early birds isn’t just about who gets more done during the day—it could also affect your heart. At the centre of it all is your circadian rhythm, the internal clock that tells your body when to feel alert and when to wind down. When your daily routine lines up with this rhythm, your body tends to function more smoothly, including your cardiovascular system.

In Sync or Slightly Off?

Early birds usually wake up and go to bed in line with natural daylight, which helps keep key hormones like cortisol and melatonin in balance. That’s good news for heart health. Night owls, on the other hand, often have to push against their natural schedule to meet work or social commitments. If you’ve ever felt exhausted after an early start despite going to bed late, you’ve experienced this mismatch. Over time, this “out of sync” feeling—often referred to as social jetlag—can put extra strain on the body and may contribute to higher blood pressure.¹

The Trade-Offs of Late Nights

There’s also growing evidence that different chronotypes are linked to distinct patterns of heart health. Research suggests that night owls are more likely to have poorer overall cardiovascular health compared to those with earlier or more moderate sleep schedules. This isn’t necessarily because being a night owl is inherently harmful, but rather due to associated lifestyle factors. Studies have found that evening types are more likely to experience inadequate or irregular sleep, have poorer diet quality, and engage in behaviours like smoking—all of which can increase heart risk. While habits such as late-night snacking, inconsistent sleep, and lower physical activity can contribute, the encouraging takeaway is that these risks are largely modifiable. With healthier routines, night owls can still support strong heart health.²

It’s Not Just About the Clock

Of course, sleep timing is only part of the picture—sleep quality matters just as much. Conditions like obstructive sleep apnea can interrupt breathing during sleep and reduce oxygen levels, putting extra pressure on the heart. Because night owls are more likely to have irregular sleep patterns, these kinds of issues can sometimes go unnoticed. Left unaddressed, they can increase the risk of serious conditions like hypertension and heart disease.

You’ve Got More Control Than You Think

The reassuring part? Your sleep habits aren’t set in stone. While your natural tendencies play a role, small changes can make a real difference. Getting sunlight early in the day, sticking to consistent sleep and wake times, and staying active can all help bring your circadian rhythm back into balance. Even if you naturally lean towards late nights, these adjustments can support better sleep—and a healthier heart.¹

So… Is One Better Than the Other?

So, do early birds have healthier hearts than night owls? In general, they might have a slight advantage—but it’s not a done deal. What matters most is how well you support your body’s natural rhythm and the choices you make each day.¹

If you’re dealing with ongoing sleep issues, constant fatigue, or symptoms like loud snoring or daytime drowsiness, it’s worth paying attention. Speak with a doctor to rule out underlying conditions and get the right support to improve both your sleep and your heart health.

How Sove CPAP Clinic Can Help

Founded in 2008, Sove CPAP Clinic has grown to become a leading provider of respiratory and sleep services and products in Australia, with over 90 clinics nationwide. Our comprehensive clinical team includes Respiratory & Sleep Specialists, Sleep Technologists, and CPAP Consultants, ensuring you receive personalised care. All medical procedures, including sleep studies and lung function testing, are bulk billed to all eligible Australians, with minimal wait time.

If you would like to speak to a Respiratory & Sleep Physician, book a bulk-billed sleep study, or seek advice for sleep apnea, you can reach us at 1300 76 29 39 or info@thecpapclinic.com.au.

ALWAYS FOLLOW THE DIRECTIONS FOR USE. CPAP is used for Obstructive Sleep Apnea treatment. When considering whether a sleep study or CPAP is right for you, speak to your doctor. Medicare criteria and T&Cs apply.

References:

1. Dudley, Katherine. “Early Birds May Be More Active, but Night Owls Can Catch up - Harvard Health.” Harvard Health, 6 Nov. 2020, www.health.harvard.edu/blog/early-birds-may-be-more-active-but-night-owls-can-catch-up-202011062316.

2. “Being a Night Owl May Increase Your Heart Risk.” American Heart Association, 2026, newsroom.heart.org/news/being-a-night-owl-may-increase-your-heart-risk.