The short version
- What they are: free or low-cost ways to calm your nervous system, plus a few simple tools that help you do them.
- The big four: slow breathing, cold water on your face, humming, and deep pressure such as a weighted blanket.
- Examples in our directory: Moonbird (a handheld breathing guide), CalmiGo (a breathing and grounding device for panic moments), and the apps One Deep Breath, Insight Timer, Vagus+ and Vagusvit.
- The evidence: better than you'd expect. Slow breathing in particular has solid research behind it.
- Best for: skeptics, anyone on a budget, and honestly everyone, as a starting point.
- The catch: they take some effort, and effort is hard to find when you're already depleted.
Start here, even if you plan to buy a device
There's an irony to this whole space. A lot of us are frazzled partly because of the phone that pings all evening, and the fix being sold back to us is another gadget with an app.
Devices can absolutely help, and we review plenty of them. But your nervous system has built-in ways to shift gears, and they're free. In one way or another, every device on this site is trying to do what a slow exhale does, so it's worth knowing the originals.
1. Slow breathing: the most evidence-backed tool on this site
If you only try one thing, make it this.
When you breathe in, your heart rate rises slightly. When you breathe out, it slows. That normal rhythm is called respiratory sinus arrhythmia, and it's one of the clearest windows into your vagus nerve at work. Making your exhale longer than your inhale leans into the slowing side.
Two patterns have good research behind them:
- Slow, even breathing at about six breaths a minute. That's roughly five seconds in and five seconds out. This pace tends to maximize heart rate variability, a key marker of how flexible your stress response is.
- Cyclic sighing. Take two inhales through the nose (a full breath, then a small top-up), then let out a long, slow exhale through the mouth. In a 2023 Stanford study of about 100 people, five minutes of this a day improved mood more than the same time spent in mindfulness meditation.
Tools that help: the hard parts are remembering to do it and keeping the pace when you're anxious.
- Moonbird is a palm-sized device that physically expands and contracts, so you can follow it with your eyes closed.
- CalmiGo is built for panic moments. It combines paced breathing with scent and something to hold.
- One Deep Breath and Insight Timer are apps with free tiers that pace your breathing with sound, vibration or a bell. Vagus+ and Vagusvit are simpler pacers that collect no data.
- Breathing necklaces are basically narrow tubes you exhale through. They do the same job with no battery at all.
- So do pursed lips.
2. Cold water on your face
When cold water hits your face, your body triggers the dive reflex, an old survival response that slows your heart rate. It's fast and hard to ignore, which makes it useful in a spike of panic, when gentler tools can't get through.
This isn't a wellness fad. Dialectical behavior therapy (DBT), a well-established therapy, teaches it as a crisis skill: fill a bowl with cold water, hold your breath, and put your face in for 15 to 30 seconds. A cold pack over your eyes and cheeks works too.
You don't need an ice bath. A cold splash on the face does the job.
Check with your doctor first if you have a heart condition, because slowing your heart is the whole point.
3. Humming, singing and gargling
The vagus nerve supplies muscles in your throat and voice box. That's why humming, singing and gargling show up on so many "vagus nerve exercise" lists.
Honestly, the research here is thin: it's a plausible idea that hasn't been studied much. But humming also lengthens your exhale naturally, which brings you back to tool #1, and it costs nothing. A few long, low hums before bed won't hurt.
4. Deep pressure: weighted blankets
There's a reason a firm hug feels better than a light one. Deep, even pressure calms a lot of people, and a weighted blanket is the easiest way to get it while you sleep.
The evidence is better than you'd think. A 2020 Swedish randomized trial of 120 adults with insomnia and psychiatric conditions found that weighted blankets improved their sleep over four weeks. The claims you'll see about serotonin, melatonin and cortisol are much shakier.
A note if you're in perimenopause: weighted blankets are warm. If you're dealing with night sweats, look for a knitted or "cooling" version, or use one for winding down on the couch rather than all night.
The effort problem
If these work, why does anyone buy a $300 device?
Because these take effort, and effort is exactly what you're short on when you're burned out:
- Breathing slowly when you want to pant takes practice.
- Nobody wants cold water on their face at 6am.
- Weighted blankets are heavy and a pain to wash.
Devices do some of the work for you, and there's no shame in that. When you're running on empty, let the tool carry you. The low-tech options do have a quiet benefit, though. Each time you calm yourself down with your own breath, you build the skill, and the confidence, to do it anywhere with nothing in your bag.
Most people end up with a mix: a device for the depleted days and a breathing habit for everything else.
Try this tonight
Lie down for five minutes. Breathe in through your nose for a count of four, then out through your mouth for a count of six to eight. If your mind wanders, start over without judging yourself. That's the whole practice.
The bottom line
Start here. That's not because devices don't work. It's because these do, they're free, and they'll make any device you buy later work better. If you need help remembering to practice or keeping the pace, the simple tools below are a good middle ground. If you want more help than breathing can give, see the Haptics and the Zappers.
