Study finds night owls are more at risk of diabetes and heart disease

If you’re a night owl, you may need to keep a closer eye on your health, according to scientists.

Research on sleeping habits and metabolism has found that those who tend to stay up late may be more at risk of developing diabetes and cardiovascular disease.

The study, which was conducted by Professor Steven Marlin, a metabolism expert from Rutgers University, divided obese adults into early birds and night owls and surveyed their activity and sleep habits. Monitoring their patterns for a week, scientists observed how their bodies used food as fuel.

As autumn sets in, As the seasons shift, we often tend to become more aware of our health, as well as picking up more coughs and colds.

"With GP waiting times increasing in many practices, and appointments for non-urgent care more difficult to access, private blood testing is becoming a common alternative for many people looking to take control of their health.”

The difference between early birds and night owls 

The scientists found that the early risers of the study were more sensitive to insulin and burned more fat than the late risers. The night owls didn’t experience the same sensitivity to insulin and their bodies preferred carbohydrates as an energy source, rather than fat.

While the reasons for this difference aren’t yet clear, it’s believed to be connected to the circadian rhythm – the inbuilt schedule that dictates our body clock.

Speaking on this Malin commented, “Night owls are reported to have a higher risk of obesity, type 2 diabetes and cardiovascular disease when compared with early birds,” he said. “A potential explanation is they become misaligned with their circadian rhythm for various reasons, but most notably among adults would be work.”

This discovery could impact the conversation around nightshift work and even how we adapt to the clocks changing with the seasons.

Time for change?

This study isn’t alone in suggesting a negative impact from daylight-saving hours, with rumours circulating that government is considering rolling out British Summertime all year round.

A major study in 2020 found that losing an hour's sleep due to daylight saving increases hospital admissions for a serious heart rhythm condition known as atrial fibrillation.

The time between March and October, when the clocks are one hour ahead, is known as British Summer Time. Daylight Savings Time is the process of putting the clocks back one hour during the spring so that the evening daylight lasts longer during the day.

How to stay healthy as a night owl 

  • Let the light in

Those who head to bed late and sleep in generally tend to get much less sunlight than those on earlier schedules. Over time, this routine can have a bad impact on your mood. This continuous lack of light can lead to feelings of depression, much like Seasonally Affective Disorder (SAD).

To help keep those blues at bay, try and get around 30 minutes of bright light as soon as you get up. Light boxes are a good option if the weather is gloomy, but it’s best to get outside where possible.

  • Make time to connect

Alongside the physical impacts of being a night owl, there can also be problems when it comes to social interactions. When you’re on a very different schedule to friends and family, it can make it difficult to find convenient times for connection, leading to periods of isolation. Over time, this can lead to feelings of loneliness and depression. Try to make time where your schedules overlap to catch up over a meal or look for evening social groups.

  • Watch the night-time snacking

Snacking can be a common problem for people who stay up late. While your meals may fall at odd times because of work schedules, it’s a good idea to try and avoid large meals late at night

Researchers behind one study, state that 8 pm should be the latest you eat. They found that female night owls were more than twice as likely to have excess belly fat, high blood sugar and overall unhealthy fat levels than morning people. This was believed to be due to a combination of eating past 8pm and too much artificial light at night, which may affect your metabolism.

  • Find time for exercise 

Studies have shown that night owls could be at greater risk of developing cardiovascular disease. Having a sleep schedule that doesn’t fall in with the normal light schedule of the day can put a lot of stress on the body.

Exercise is a great way to keep your heart healthy but it’s important to be mindful about where you do it. Someone who stays up late may find they exercise better in the evenings, but this isn’t necessarily the best idea. An intense workout can lead to even later bedtimes as the body recovers from the workout. If possible, move that exercise session to an earlier time in the day, or opt for more relaxing forms of exercise, such as yoga or Pilates.

Are those late nights catching up on you?

If you notice that you’re not feeling 100%, even though you’ve been looking after yourself, sleeping well and eating right, if may be a good idea to take a closer look at your health with private blood testing.

Our Comprehensive Plus VIP health screen offers a broad range of health checks for common diseases and conditions, as well as vitamin and hormone deficiencies.

Booking your private blood test at a local clinic

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After you have selected the right test for you, simply order online through our secure payment system or chat to a member of our team. Once your order is placed, you’ll receive all the information you need to arrange your convenient blood draw appointment at one of our Spire Hospital locations.

How your appointment works 

We partner with Spire Healthcare to offer a professional phlebotomy service. This guarantees that your blood samples are taken and handled correctly and that your results are processed efficiently by clinical professionals. Our confidential blood examinations are available at over thirty private clinics around the UK.

At your appointment, the friendly team will talk to you about your test, collect your blood sample and send it off for testing at an accredited partner laboratory. All you need to do is arrive for your appointment. We’ll take care of the test, and the rest.

Find out more about our comprehensive health screening  

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