New survey shows your relationship status tallies with how well you sleep

Couples that sleep well together, well, you know … Shutterstock^[14]

Casual partners keep us up at night

Our study^[15], to be published in the March edition of the Sleep Science^[16] journal, finds it takes people who have casual or occasional partners just over ten minutes longer to fall asleep than people who live with a regular partner.

Ten minutes might not sound like a long time – but studies show^[17] just four to eight minutes can be the difference between people with insomnia (seen as hyperarousal with physiological measures like increased metabolic rate, higher body temperature, altered heart rate and activity in the brain) and healthy sleepers.

When we break this down by gender in our study, we see women are much more likely to be affected by relationship status than men. Men fall asleep just as quickly when they have a casual partner compared with a regular, live-in partner.

These differences are only seen when we look at what is called “sleep latency” – the amount of time it takes from turning off the light to when you fall asleep. The other main measure – the total amount of sleep overnight – does not change depending on relationship status. People in our study in relationships (regardless of living situation) also report higher post-sex emotional satisfaction, and more frequent orgasms.

So, while you might feel like your sleep is worse because it takes a little longer to get to sleep, we don’t expect this to play out as major changes to daytime fatigue or sleepiness for people who are single or in casual relationships.

Relationship status seems to have a greater impact on women’s sleep. Shutterstock^[18]

Read more: Why do we wake around 3am and dwell on our fears and shortcomings?^[19]

Why is it so?

A few things could explain why relationship status impacts sleep.

People who are in casual (or new) relationships might have greater physiological arousal (racing hearts, breathing faster^[20]), which can make it harder to fall asleep^[21]. People in new relationships that are still at the casual stage might experience more excitement or anxiety when sleeping next to their new partner – or they might be worrying about the status of their relationship.

On the other hand, being in an ongoing relationship may be associated with feelings of physical and emotional security, which can reduce physiological arousal^[22] – and improve sleep. It’s possible we find it easier to sleep next to someone we trust because it is an evolutionary adaptation. That is, we feel safer from predators when sleeping in an environment we perceive to be “secure^[23]”.

Read more: Is this love ... or an arrhythmia? Your heart really can skip a beat when you're in love^[24]

Now to bed … or beds

If you were to go to the doctor and tell then you’re having trouble sleeping, chances are they would recommend strategies like improving your sleep habits^[25] or cognitive behavioural therapy^[26] for insomnia. But these strategies don’t consider your relationship status.

Our findings suggest doctors could consider your relationship status as they work out how to help you get a better night’s sleep.

The next step for this research area is to understand how sleep changes when people are in the same bed as their partner or not. People in casual relationships may find falling asleep easier when they sleep alone, whereas people who live with their partners may not – we just don’t know yet. We also need objective data – from wearables or overnight brain activity monitoring – rather than surveys.

Read more https://theconversation.com/new-survey-shows-your-relationship-status-tallies-with-how-well-you-sleep-176977