More couples are choosing to sleep in separate beds or separate rooms. The trend has a catchy name, sleep divorce, but it has nothing to do with ending a relationship. It is about protecting sleep, and in many cases, protecting the relationship itself.

As a sleep doctor, I get asked about this often. Patients want to know if sleeping apart is a red flag or a smart fix. Here is what the research actually says.

How common is sleep divorce

This is not a fringe habit. Survey data from the American Academy of Sleep Medicine (AASM) shows the numbers have grown steadily over the past few years. A 2024 AASM survey found that 29% of Americans sleep in another bed in the same bedroom or in another space in the home to accommodate a bed partner. A separate AASM survey from March 2023 found that 35% of Americans sleep in separate rooms occasionally or consistently, with millennial couples the most likely to do so at 43%, compared with 22% of baby boomers.

So this is a real and growing pattern, not just a TikTok trend, even though social media has clearly helped normalize it.

What actually happens to your sleep when you share a bed

This is where the science gets interesting, and a little more nuanced than headlines suggest.

Bed sharing increases movement and awakenings. Actigraphy studies, which track sleep using wrist movement sensors, consistently show that couples move more and wake more often when sharing a bed compared to sleeping alone. A 2020 study in Frontiers in Psychiatry noted that co-sleepers wake up more often than solo sleepers, and limb movements are significantly more frequent during co-sleep than during individual sleep.

But bed sharing may also stabilize REM sleep. The same study found something that surprised researchers. Despite the increase in movements and awakenings, sleep architecture and sleep-stage physiology stayed intact during co-sleep, and REM sleep was actually stabilized and promoted. REM sleep matters because it supports memory and emotional processing.

The effect is not the same for men and women. Several studies point to a sex difference. One actigraphy study found that men slept more when bed sharing, while women’s total sleep time did not change either way. Other research has found women experience less sleep fragmentation when sleeping alone compared to bed sharing. One proposed explanation is simple physiology: men tend to move more during sleep, based on actigraphic measures, which can disturb a female bed partner.

Your relationship quality shapes your sleep more than most people realize. A large 2024 systematic review and meta-analysis pooling 62 studies and nearly 44,000 participants found a clear link between the two. Researchers found a moderate correlation between better couple relationship quality and better overall sleep quality, as well as longer sleep duration. The same analysis found that greater partner responsiveness was linked to better sleep quality, while higher partner conflict was linked to poorer sleep quality. It works both ways too. In the studies that could not be pooled statistically, greater partner conflict was linked to longer sleep latency and more wake episodes measured by actigraphy.

In plain terms: how you get along during the day affects how well you sleep at night, and how poorly you sleep can, in turn, feed back into daytime conflict.

Why couples choose to sleep apart

The reasons are rarely dramatic. They usually come down to specific, fixable problems:

• Snoring and undiagnosed sleep apnea. This is probably the single biggest driver. A partner’s loud or irregular breathing is one of the most disruptive things to a bed partner’s sleep.
• Mismatched schedules. One partner is an early riser, the other is a night owl, and neither wants to disturb the other.
• Restlessness or frequent movement. Some people simply move more in their sleep than others.
• Temperature preferences. One person wants the room cold with heavy blankets, the other wants it warm and light.
• Light and phone use. Scrolling in bed disturbs a partner who is trying to fall asleep.

Sleep medicine researchers now treat this as common enough to study formally. A 2024 study in Sleep Health developed the Couples’ Sleep Conflict Scale, a validated tool built specifically to measure how much conflict exists around sleep in romantic relationships. The fact that a scientific instrument now exists just for this tells you how much sleep-related friction shows up in real relationships.

Related research backs this up. A 2023 study in the Journal of Sleep Research on 143 mixed-gender, bed-sharing couples looked at how sleep hygiene habits, whether concordant or discordant between partners, related to sleep quality, emotional distress, and conflict frequency. The takeaway is that mismatched sleep habits, not just mismatched personalities, are a genuine source of relationship strain.

Does sleeping apart actually help

For couples whose sleep is being disrupted by a partner, the answer from available data is generally yes, at least for sleep quality.

In a January 2023 SleepFoundation.org survey of 1,250 U.S. adults, only 1.4% had started and maintained a sleep divorce in the past year, but 52.9% of those people said the arrangement improved their sleep quality, and they reported sleeping an extra 37 minutes a night since sleeping apart.

That extra 37 minutes matters more than it sounds. Consistently losing even 30 to 40 minutes of nightly sleep over months can measurably affect mood, concentration, and physical health.

On the relationship side, AASM has taken an official position that the choice to sleep apart is not itself a warning sign. AASM spokesperson Dr. Seema Khosla has said that sleep divorce is not about ending a relationship, but about prioritizing sleep health and addressing the sleep issues that may be eroding a relationship, such as snoring.

The catch: don’t let separate rooms hide a bigger problem

Here is the part I want every reader to take seriously. Sleeping apart can quietly become a way of avoiding a diagnosis instead of solving one.

If your partner snores heavily, gasps, or seems to stop breathing at night, moving to another room does not fix the underlying issue. It just removes you from having to witness it. Undiagnosed obstructive sleep apnea carries real cardiovascular and metabolic risks for the person who has it, independent of whether their partner is in the room.

The same caution applies on the relationship side. Sleeping separately because of a genuine sleep disorder or a scheduling mismatch is very different from sleeping separately because you are avoiding your partner. If the decision to split up sleeping arrangements comes from unresolved conflict rather than a practical sleep problem, separate rooms will not fix that conflict. It may just make it easier to avoid talking about it.

A practical way to think about it

If you are considering sleeping apart, ask yourself these questions first:

1. Is there a specific, nameable cause? Snoring, mismatched schedules, restlessness, or temperature preferences are all legitimate, fixable reasons.
2. Has snoring or gasping been evaluated? If your partner snores loudly or you’ve noticed pauses in their breathing, a sleep study should come before, or alongside, any decision to sleep apart.
3. Is this about sleep, or about avoidance? Be honest about whether the real issue is sleep quality or something else in the relationship that separate rooms won’t solve.
4. Could a smaller fix work first? Earplugs, a white noise machine, a larger bed, separate blankets, or adjusting bedtime routines sometimes solve the problem without needing separate rooms at all.

For many couples, sleeping apart some nights, rather than every night, offers a middle ground. Reserve it for nights when one partner is sick, working odd hours, or especially restless, and still choose closeness on other nights. This keeps the physical and emotional intimacy of shared sleep while protecting rest when it is most needed.

The bottom line

Sleep divorce is a practical solution to a real problem for a growing number of couples, and the evidence supports that sleeping apart can genuinely improve sleep quality and duration when a partner’s habits are the disruption. At the same time, relationship quality and sleep quality are closely linked in both directions, so the choice to sleep apart should come from addressing a real sleep issue, not from avoiding your partner. And if snoring or breathing pauses are part of the picture, get that evaluated by a sleep specialist rather than treating separate rooms as the fix.

---

Medical disclaimer: This article is for educational purposes only and does not replace personalized medical advice. If you or your partner have symptoms of a sleep disorder such as snoring, gasping during sleep, or insomnia, talk to a sleep medicine physician.

References

1. American Academy of Sleep Medicine. How Many Americans Are Opting for a “Sleep Divorce”? Sleep Review, 2024.
2. American Academy of Sleep Medicine. 2023 AASM survey on sleep divorce prevalence. AASM, 2023.
3. Andre C, Spencer RM, et al. The effects of bed sharing on sleep: from partners to pets. Sleep Health. 2021 Jun;7(3):314-323. doi: 10.1016/j.sleh.2020.11.011.
4. Drews HJ, Wallot S, Brysch P, et al. Bed-Sharing in Couples Is Associated With Increased and Stabilized REM Sleep and Sleep-Stage Synchronization. Frontiers in Psychiatry. 2020 Jun 25. doi: 10.3389/fpsyt.2020.00583.
5. Walters EM, Phillips AJK, Boardman JM, Norton PJ, Drummond SPA. Vulnerability and resistance to sleep disruption by a partner: A study of bed-sharing couples. Sleep Health. 2020;6(4):506-512.
6. The association between couple relationships and sleep: A systematic review and meta-analysis. Sleep Medicine Reviews / ScienceDirect. 2024. PMID: 39514915.
7. Novak JR, Miller KC, Gunn HE, Troxel WM. Development of the Couples’ Sleep Conflict Scale: A new tool to assess conflict around sleep in romantic relationships. Sleep Health. 2024;10(3):308-315. doi: 10.1016/j.sleh.2024.01.009.
8. Novak JR, Miller KC, Gunn HE, Troxel WM. Yours, mine, or ours? Dyadic sleep hygiene and associations with sleep quality, emotional distress, and conflict frequency in mixed-gender, bed-sharing couples. Journal of Sleep Research. 2024 May;33(3):e14047. doi: 10.1111/jsr.14047. PMID: 37749792.
9. SleepFoundation.org. Do We Sleep Longer When We Share a Bed? Survey of 1,250 U.S. adults, January 2023.