Night comes, you get into bed and, almost out of inertia, your dog or cat jumps on the mattress to curl up at your feet. For many people, pets are full members of the family and even share the sheets. According to a report from the platform Sleep Foundation56% of people say they sleep with a pet in their room.
The bond is so strong that the mere idea of changing this habit generates rejection. Sleep psychologist Shelby Harris recounts in an interview for The New York Times that when caring for patients with insomnia problems, the first reaction is usually almost defensive: “I have a dog. You’re going to tell me not to sleep with him.” And, although sleeping with our animals gives us an immense feeling of peace, the scientific community has begun to empirically measure what happens in our body and brain during the night. The bad news is that, objectively, your rest could be suffering much more than you realize.
Data under the microscope. An exhaustive study published in the scientific journal Scientific Reports decided to put exact figures on this phenomenon. Researcher Brian N. Chin and his team analyzed the habits of a representative sample of more than 1,500 adults in the United States. The results revealed that sleeping with pets is directly associated with poorer perceived sleep quality and greater severity of insomnia symptoms.
Interestingly, the impact is not identical with all animals. Research analyzes showed that this negative effect on human sleep is strongly associated with dog owners, but no evidence was found that the same damage occurs when sleeping with cats. This difference may be due to the fact that dogs have greater sensitivity to external stimuli, waking up more easily to the noise of cars or barking in the neighborhood.
The main problem lies in the sleeper’s self-deception. The author of the study highlights a surprising fact: 93% of people who slept with their pets firmly believed that their pets had a positive or neutral effect on their sleep. This disconnection between perception and biological reality is also supported In another study carried out on 12 women; Although the monitoring devices showed that the dogs constantly interrupted their rest, they rarely reported these interruptions the next morning.
Why do we rest worse if we feel good? Dr. Vsevolod Polotsky, a sleep researcher at Johns Hopkins University, explains that the sleep of dogs and cats is not continuous; They inevitably move, bark, scratch or walk on the bed and on us. All this nocturnal activity causes what experts call “microawakenings.” Neurology professor Kristen Knutson details that these brief interruptions, which we are often not even aware of, are extremely disruptive because they abruptly take us out of the deep sleep phase. Worse yet, they have been associated with the release of the stress hormone cortisol, which significantly worsens overall rest.
Furthermore, the investigation of Scientific Reports demolished one of the most widespread beliefs: the myth that the pet acts as a protective shield against anxiety before sleeping. Although high levels of life stress were associated with worse sleep, the scientists found no evidence that sleeping with the animal had a “buffering” effect that would protect the person from the ravages of stress.
However, purely emotional logic has an undeniable weight in this equation. Sleeping with a pet, especially one with whom you have a close bond, can reduce the sense of perceived vulnerability and dramatically increase the feeling of security. We are faced with a complex exchange: our physical body experiences fragmented and less efficient sleep, but the animal’s mere presence helps emotional regulation by making us feel happy and protected.
The verdict of the specialists. For animals, the experience of sharing sheets is undoubtedly positive. Dr. Dana Varble, veterinary director of the North American Veterinary Community, points out that animals Those who sleep with their owners experience higher levels of trust, as well as an increase in beneficial neurotransmitters such as oxytocin and dopamine, known as the feel-good hormones. However, in the case of humans, medical specialists warn about certain risk profiles:
- Respiratory problems: People with allergies or asthma are at risk of seeing their symptoms activated by being exposed to allergens such as animal dander for multiple hours in a closed space.
- Persistent allergens: Dr. Raj Dasgupta, pulmonologist, warns that allergens They also reside in the animal’s saliva and skin, which can cause watery eyes and continued nasal congestion throughout the night.
- Previous disorders: For those who suffer from chronic problems such as insomnia or sleep apnea, Dr. Polotsky is very clear when stating that bed sharing “is particularly harmful” and will prevent the patient from falling asleep again when they wake up.
There are, of course, medical exceptions where the balance tips in favor of the animal. Service dogs trained for patients with post-traumatic stress disorder (PTSD) are of great help by knowing how to identify physical symptoms and wake their owners to interrupt nocturnal nightmares. Dr. Dasgupta also recognizes that, For people dealing with depression or anxiety, the pet can act as a comforting “big blanket” that effectively decreases distress.
The unwanted companions. Beyond sleep quality, hygiene adds another layer of risk to nighttime living. A revealing pilot study published in the scientific journal Pathogens investigated what exact bacteria and parasites we take to bed. Of the 50 animals analyzed, 30% literally slept in bed, under the blankets with their humans. The most striking thing about this research was the great contradiction of the owner: although 42% of all respondents cited lack of hygiene as the main reason why pets should not be allowed into the bedroom, in practice, many ignored the risk and allowed them to sleep there.
Microscopic measurements of the fur were surprising. The aerobic colony count (ACC) on the dogs’ hair exceeded the maximum limits of bacteria tolerated on hospital surfaces or in food preparation areas by 4 to 43 times. Even more graphic is that 64% of the dogs tested positive for fecal bacteria (Enterobacteriaceae) directly on the pads of their paws. Visible fleas were also found in 14% of the animals’ usual resting areas.
Dr. Josh Daniels, veterinarian and microbiologist, warns that the most common insects What we are exposed to in these circumstances are precisely ticks and fleas, which have the potential to transmit serious diseases such as Lyme disease. In addition to zoonoses, there is a real risk of suffering infections from scratches and bites if the animal is frightened by an instinctive reflex when disturbed in the middle of a deep sleep.
How to reduce damage without removing them from the room? If after reading this, expelling your pet from the bedroom does not seem like a viable option, specialists offer several practical strategies to protect your health and your sleep:
- Environmental filters: Consider using a HEPA air filter in the room to remove more than 99% of pet dander and other allergy triggers.
- Rigorous cleaning: Wash sheets much more frequently (at least once a week) to prevent fungus, hair and dirt from accumulating.
- Immaculate Pets: Maintain a regular bathing routine for your animal, as a clean pet is less likely to carry germs, fleas, and ticks to your bedding.
- Delimit its space: Establishing a delimited space in a specific area of the bed allows the animal to be close, but prevents it from literally sleeping next to you.
- Pre-rest activity: Walk your dog just before bed so he has one last chance to go to the bathroom, as well as helping him burn off excess energy so he moves less at night.
The big decision. Scientific evidence clearly shows that the habit of sharing a bed with our dogs and cats is more physically disruptive than our brains want to admit. As an article in The Conversationthe definitive question you should ask yourself is not whether sleeping with your pet is universally good or bad, but rather doing an exercise in honesty about the balance of priorities: are you prioritizing maximum emotional comfort or the search for uninterrupted sleep?
If the scale is difficult to balance, the recommendation of Dr. Nancy Foldvary-Schaefer of the Cleveland Clinic works as the ultimate compass: “If sleeping with your pet is affecting the quality of your sleep and you wake up tired every morning, it’s probably best to find a different sleeping arrangement.”
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