For people with sensory processing disorder, weighted blankets can be valuable tools. I use mine for more than just sleeping; it helps me ground myself when my senses are overwhelmed, it helps me focus, and it helps me calm my anxiety. Many people report feelings of safety and relaxation when they use their weighted blankets for sensory processing disorder. In this post, I discuss the science of weighted blankets when it comes to sleep and relaxation, as well as my own experience using a weighted blanket for SPD.
Weighted Blankets and Sleep in SPD
Tools like weighted blankets and vests use deep pressure, which is thought to reduce the body’s level of arousal, leading to relaxation. They’re highly popular among kids and adults alike, and some people swear by them for alleviating insomnia. But when it comes to whether weighted blankets help you fall asleep, stay asleep, and enjoy better-quality sleep, the evidence is mixed.
What Scientific Research Says
I found studies that offer evidence for and against the idea that weighted blankets can improve sleep in people with sensory processing difficulties, often defined by falling asleep faster, waking up less during the night, improved mood in the morning, and other measurements like sleep efficiency.
Surveys
Some research shows that weighted blankets are effective at improving sleep quality and sense of restfulness as well as shortening the time to fall asleep. Weighted blankets were shown to improve morning mood in this study, but the overall results were inconclusive. Most of the studies I looked at that concluded that weighted blankets can improve sleep used surveys to collect their data, which have their limitations.
Observational and Experimental Studies
While surveys offer valuable insights into subjective experiences, experiments can provide a more objective look at a question. In a study that used actigraphy (small accelerometers that measure movement), weighted blankets had no effect on the number of times participants moved in their sleep. In a different study on people without SPD, weighted blankets were associated with a significant 32% increase in salivary melatonin, but they didn’t affect cortisol, oxytocin, subjective sleepiness scores, or the duration of sleep.
On the other hand, another study that used a sleep sensor and surveys (funded by Gravity Blanket) found a significant 7% improvement in a measure called Wake After Sleep Onset and improvements of 2% or less in other sleep measures.
To me, the most interesting part of that last study is that participants’ subjective reports seemed to overshoot the measurements – by a lot. They thought they were sleeping 36% better without waking up in the night. Compare this to the 7% improvement in Wake After Sleep Onset, and this seems to match what we see from other surveys; people feel like they sleep better when they use a weighted blanket, even if the objective measurements don’t match.
More research is needed to understand the effects of weighted blankets on sleep in people with sensory processing disorder, but if you feel that they help you, why not use one?
Are Weighted Blankets Safe?
As far as I can tell, yes. The American Academy of Neuroscience says, “No serious adverse events with [weighted] blanket use” were found in its review of the literature on the topic. The main considerations involved in this weighted blanket competency training program are:
- Do you have medical conditions that would be a concern?
- Do you have claustrophobia?
- Don’t walk around with it over your head.
- Carry it in an ergonomic manner.
- Do not use it as a restraint.
As far as weight recommendations, I had trouble finding an authority on the matter. A 30-lb weighted blanket was shown to be safe as measured by heart rate, blood pressure, and blood oxygenation. Manufacturers typically say their weighted blankets are safe only for adults, adolescents, and older children due to the risk of suffocation in young children. But overall, we can be confident that weighted blankets are safe when used appropriately.
Should You Sleep with a Weighted Blanket for Sensory Processing Disorder?
If using a weighted blanket to fall asleep feels good to you, I say go for it.
I get a little too hot when I sleep with a weighted blanket during the summer, so I tend to only use mine for that in the colder months. Part of why I find those studies so interesting is that they surprised me. Based on my own experience, I expected to find a consensus on their efficacy.
Turns out, I do the same thing those study participants did; I think of my sleep as being vastly improved by my weighted blanket. I even identify waking up fewer times a night as one of the most dramatic differences I notice!
Sleeping with a weighted blanket is a cozy, relaxing experience for many people. There’s something kind of special about using a weighted blanket. It’s like it elevates my sleeping experience from regular relaxing to extravagant relaxing.
Throughout the day, our senses are bombarded by stimuli. In my experience of sensory processing disorder, being tired makes my nervous system feel spring-loaded. My ability to handle sounds, lights, and movement declines as the day progresses. Making decisions gets harder, driving gets harder, and by the time I get to bedtime, it can be hard to decompress and fall asleep. Compounded by some of the medications I take and my tendency to think too much, my insomnia sometimes features a lot of restless tossing and turning. Fortunately, my weighted blanket is there to help me. Using a weighted blanket for sensory processing disorder can look like a lot of things, though — not just sleep.
Calming Overstimulation and Anxiety with Weighted Blankets
Where the literature is iffy on weighted blankets for sleep, it solidly supports the claim that weighted blankets are effective at reducing anxiety. Occupational therapists have used weighted blankets for sensory processing disorder and associated anxiety for decades, and there’s a good reason for that.
Deep Pressure for SPD
In 1992, Temple Grandin published a study on the effects of her groundbreaking “hug machine.” The machine is designed to deliver deep-pressure stimulation using a set of pads that squeeze the user’s body. Dr. Grandin’s hug machine was found to have a calming effect on people with ASD, college students, and animals. Deep pressure stimulation has been further explored as a therapy for those with sensory processing disorder, even leading to the development of inflatable smart vests, pneumatic compression garments, and shape memory alloy spring garments.
Weighted blankets provide the same kind of deep pressure touch that a compression vest, Dr. Grandin’s hug machine, or a real hug from someone you trust does. It’s this consistent, firm pressure that can settle your senses and put you back in the moment.
Sensory Over-Responsivity, Sensory Defensiveness, and Anxiety
If you have sensory over-responsivity (SOR) as part of your sensory processing disorder, you know how quickly you can go from cool to completely overwhelmed. When your nervous system is highly activated, you might have trouble functioning in the way you usually do, whether it’s focusing, planning actions, or keeping your emotions regulated. SOR is also associated with sensory defensiveness, which means that you have strong negative reactions to stimuli that aren’t dangerous.
It’s incredibly draining to live with sensory defensiveness. I’m fortunate to have gotten treatment when I was young, which improved my symptoms in that arena. I remember being so terrified of getting water in my eyes as a kid that I screamed and sobbed if one tiny droplet rolled down my forehead during a bath. These days, my sensory defensiveness is much better, especially when I’m well rested.
There’s a complicated interplay between SOR and anxiety. When you have bad experiences with stimuli that are too much for you, it’s easy to get anxious about encountering them unexpectedly. Being prone to anxiety can mean your guard is always up, which sensitizes you to your environment. SOR and anxiety can feed into one another, and teasing apart the causative mechanisms is an individual process.
In general, we know that sensory over-responsivity (SOR) and anxiety often co-occur, and deep-pressure interventions are commonly used by occupational therapists to reduce discomfort and sensitivity. One such intervention is a weighted blanket.
How to Use a Weighted Blanket for Sensory Processing Disorder
(According to me, your well-read layperson.)
Firstly, if you don’t yet have one, it’s important to get one that you like. The main function is, of course, the weight, but as this article is about sensory processing disorder, I imagine you have concerns about a blanket’s other sensory features as well. When sifting through the options online, think about:
- Weight (Super heavy? Just a tad weighty?)
- Material (Softness, durability, how to wash, etc.)
- Dimensions (I love my bed-size blanket, but I used to have a lap pad that was great.)
- What’s inside the blanket? (Consider the tactile and auditory aspects of beads vs. sand, for example.)
One way I like to use my weighted blanket is to get into a seated position and wrap the blanket around me like a cape so that it drapes over my shoulders. Then, I take a moment to arrange the extra material on top of my legs, grab the edges of the blanket in each hand, and pull it closed in front of me so that I basically just look like a floating head. A really relaxed floating head.
I don’t think there’s a wrong way to use a weighted blanket, as long as you’re being safe. Sleep with it, sit with it, put it on your lap — whichever way you choose to use it is right.