An insomniac friend unwittingly hijacked my sleep recently.

I’d never had trouble staying asleep before, but my friend started texting at 2am to pass the time.

I keep my mobile phone on my bedside table, so his texts disturbed me, even with the phone on vibrate – the buzz, accompanied by a lit screen, jolted me awake.

Eventually I activated a do-not-disturb setting: my phone remained blissfully silent and dark when I received unwanted texts between 11pm and 8am, and my sleep returned to normal.

Mobile phone alerts, trips to the bathroom or other things spoil many people’s nightly rest.

Research by the Sleep Health Foundation has found between 33 and 45 percent of Australians have poor sleep patterns that lead to fatigue and irritability.

International guidelines suggest that adults should sleep between seven and nine hours nightly.

Chronic sleep deprivation isn’t just making us groggy; it can harm our health.

Research shows that adults who don’t sleep enough are more likely to be sedentary and obese, and are at greater risk of diabetes, heart disease, depression and common illnesses such as colds.

“Sleep is so important to physical and mental health,” says British sleep researcher Dr Neil Stanley.

“Anything that causes poor sleep on an every-night basis can have associations with risk factors for diabetes, obesity, depression and other problems. You have to look at things that you potentially can do to improve the situation.”

Fortunately, you don’t have to swear off coffee, rely on sleeping pills or buy a fancy mattress to get a good night’s rest. These practical tips may help improve the quality of your slumber.

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1. Ditch your smartphone
1. Ditch your smartphone

Studies show that up to 60 per cent of adults keep their mobile phones in the bedroom at night.

You’re more likely to stay up too late texting, emailing or using social media, and consequently feel drowsy the next day.

“We know from research that using one app leads to another, so you are likely to spend more time on your mobile phone than you have intended to,” says Liese Exelmans, a researcher at the School for Mass Communication Research at the University of Leuven, Belgium.

“People over 60 who use their mobile phones at night have a shorter sleep duration.”

Older people are more likely to be morning persons, with a biological tendency to wake up earlier, or they may need to rise early for work or other activities.

Sleep experts recommend against bringing phones into the bedroom, but this is unrealistic for adults who use their phones as alarm clocks and who want to feel connected to friends through their devices.

“Many people have a feeling that they are disconnected from the real world if their phone is not in the bedroom,” Exelmans says. “It triggers hypervigilance. You are not completely at rest, because you expect to be contacted sometime during the night. It’s the fear of missing out.”

Donny Soh, 38, of Singapore, experienced this phenomenon first-hand. When his company launched a new product in 2016, he’d wake up at all hours to see if anyone had placed online orders.

“I would wake up perhaps three to four times per night,” says Soh, who admits that an attitude change helped him reclaim his slumber.

“Regardless of how awake I am or how often I check my phone, it doesn’t really affect the sales, and since this realisation, sleep[ing] got much better.”

The blue light that smartphones emit can also negatively impact sleep. Blue light mimics daylight, so the body is discouraged from producing sleep-inducing melatonin at bedtime, which promotes drowsiness.

“The blue light emitted by mobile phones inhibits melatonin output, telling your body to stay awake,” Exelmans says.

Adding an app with a blue-light filter can help. If you’re unwilling to part with your mobile phone overnight, minimise interruptions and encourage sleep by activating night-time blackout periods, so that no calls, emails, texts or notifications get through.

“Keep it on flight mode, dim your screen and place it on silent mode,” Exelmans says.

“Or remove some apps: Facebook, work email – it discourages you from spending time on it.” Computers and TVs emit the same blue light that smartphones do.

Best to keep computers and TVs out of the bedroom, and turn them off one to two hours before bedtime.

And if you wake up in the middle of the night, refrain from turning to a screen. Says Exelmans, “Read a book, not a tablet.”

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