Written by Kerry Aoloni
Edited by Nicki Steinberger, PhD
EDITOR’S SUMMARY: Your body has an alarm system and a calming system, and modern life keeps pressing the first one. Understanding how they work, and what the evidence actually says about breathing, movement, sleep, connection, and the widely promoted “vagus nerve reset,” can make unwinding feel less like a mystery and more like a skill. Some natural approaches have solid research behind them, others show promise, and a few are driven more by marketing than science. Knowing the difference can help you decide where to begin.
It’s 11 p.m. and the house is finally quiet. You could barely keep your eyes open on the couch an hour ago, but now that you’re in bed, sleep seems nowhere in sight. Your body is exhausted, yet your mind has suddenly found a second wind. You tell yourself to relax, which, as you may have noticed, has rarely worked. You may not even feel anxious, just tired, overstimulated, and unable to unwind. Even though you’re safe in bed, your nervous system may still be on alert, responding as though there’s something to worry about. Learning how that system works is the first step toward helping it stand down.
Stress and anxiety can have many contributing factors, from hormonal changes to environmental exposures. A Voice for Choice Advocacy’s earlier article “Anxiety’s Ongoing Cycle: The Drivers Behind It—and Natural Paths to Relief” explores these connections. The focus here is on the nervous system itself, particularly what keeps it activated and how to restore a sense of calm.
What Your Nervous System Actually Is
Your nervous system is your body’s communication network. The brain and spinal cord make up the central nervous system, while nerves extending throughout the body form the peripheral nervous system. Part of that network, the autonomic nervous system, handles functions you don’t have to think about, such as heartbeat, digestion, and blood pressure. It has three divisions. The sympathetic branch speeds your heart, raises blood pressure, releases stored energy, and slows digestion, the pattern known as “fight or flight.” The parasympathetic branch does roughly the opposite, slowing the heart and supporting digestion in what’s often called “rest and digest.” The enteric nervous system, with more than 100 million neurons of its own, handles much of the gut’s daily work largely independently.
The idea that your body has an emergency mode is more than a century old. In 1915, physiologist Walter B. Cannon described how fear and rage trigger a coordinated sympathetic response: the pupils widen, the heart quickens, digestion halts, blood sugar rises, and blood clots faster, as if the body expects an injury. He treated these changes as purposeful preparation rather than malfunction. That framing still matters, because the same machinery that helps you swerve out of danger can also be set off by a full inbox. More than half a century later, physician Herbert Benson describes the mirror image. In the early 1970s he defined and tested what he calls the relaxation response, a quiet, body-wide slowdown reached by sitting still and silently repeating a word or phrase. “We can’t change the stressors in our lives,” Benson said, but practicing for ten to twenty minutes a day, in his view, changes how you respond to them.
How it runs your day
You don’t feel any of this until something goes wrong, but your autonomic system adjusts all day long. It speeds your heart when you stand up, slows your digestion when you’re startled, and shifts your breathing as your attention moves. One window into that flexibility is heart rate variability (HRV), the small beat-to-beat changes in your pulse. Researchers often use HRV as a rough indicator of how strongly the vagus nerve, a bundle of roughly 200,000 fibers that helps control heartbeat and digestion, is influencing the heart. HRV can offer useful clues, but it doesn’t tell the whole story. Researchers are still working out exactly what it reveals about the nervous system. Still, it provides a measurable way to explore how the body responds to practices intended to promote relaxation.
Sleep is where your system gets its reset, and missing it shows up in your emotions. In a University of California, Berkeley experiment with 26 healthy adults, those kept awake for 35 hours showed more than 60 percent greater reactivity in the amygdala, a brain region central to emotional responses, when viewing negative images compared with participants who had slept normally. Sleep researcher Matthew Walker describes the sleep-deprived brain as though it had “reverted back to more primitive patterns of activity,” unable to put emotional experiences in context. This was a small, short study, and a single bad night is not a life sentence. Still, it offers a plausible explanation for why everything feels more threatening after a rough night: emotional reactions may intensify while the brain’s ability to put them in perspective weakens.
The body’s stress response serves an important purpose, preparing you to react quickly to danger. The trouble starts when that state of heightened alertness persists. In a 1998 review in the New England Journal of Medicine, stress researcher Bruce McEwen laid out the double-edged nature of the body’s stress mediators: protective in the short run, potentially damaging when they stay switched on. More recent work has clarified one way that might happen. Carnegie Mellon psychologist Sheldon Cohen and colleagues found that chronic stress reduces the sensitivity of immune cells to cortisol, a hormone involved in the body’s stress response that also helps regulate inflammation. In common-cold exposure experiments, people less able to regulate inflammation were more likely to develop cold symptoms. When cortisol can’t do that job, Cohen explained, “inflammation can get out of control.” This may help explain why chronic stress has been linked to so many health problems.
Your heart offers another clue. A 2013 meta-analysis of eight studies and nearly 22,000 people without known heart disease found that those with the lowest HRV had roughly 32 to 45 percent higher risk of a first cardiovascular event than those with the highest, depending on the measure, though the result for one of the three measures was less certain. That is an association, not proof that low HRV causes heart disease; illness, fitness, and stress could all influence HRV and cardiovascular risk independently. In everyday life, a nervous system that struggles to return to baseline may show up as poor sleep, short patience, and a body that runs on caffeine and adrenaline, though that is a reasonable inference rather than a finding from these studies. None of this means a stressful week is damaging your heart. It suggests that how readily your system recovers is worth caring about.
When stress becomes a constant companion, the signs aren’t always dramatic. You might find yourself snapping at small annoyances, struggling to concentrate, waking up tired, or feeling restless even when there’s nothing urgent to do. These experiences don’t necessarily mean something is wrong with your nervous system, but they may be clues that your body isn’t getting enough opportunity to recover.
What conventional care offers
Mainstream medicine offers several approaches to managing stress and anxiety, some with substantial research behind them. Cognitive behavioral therapy has particularly strong research support: a major review of meta-analyses found the firmest evidence for anxiety disorders and general stress, among other conditions. Benzodiazepines are prescribed for conditions including generalized anxiety disorder, insomnia, and panic disorder, but in 2020 the FDA required its strongest warning because the drugs can cause abuse, addiction, physical dependence, and withdrawal reactions, even when taken as prescribed for days to weeks.
For epilepsy, treatment-resistant depression, and recovery after stroke, surgeons can implant a device that stimulates the vagus nerve directly, and the Cleveland Clinic notes that external consumer devices cannot match the frequencies and voltages of implanted ones. Managing stress and anxiety doesn’t have to be a choice between conventional treatment and natural approaches. Lifestyle practices can play a valuable role, while professional care may offer additional options when symptoms continue or interfere with daily life. Because symptoms such as a racing heart, persistent insomnia, or unusual agitation can have causes beyond stress, it’s worth seeking medical guidance when they’re new, persistent, or worsening.
Natural Ways to Help Your Nervous System Settle
These approaches work through the same levers medicine does: they change your breathing, muscle tension, sleep, and the signals your body sends your brain. Their effects in studies are often modest and the research varies in quality, but many of these practices are accessible, low-cost, and carry relatively little risk when practiced appropriately. Think of this as a menu, not a prescription.
Breath: a way to influence your stress response
Slow, deliberate breathing may be the closest thing to a direct handle on your autonomic system, because breathing is the one automatic function you can also control on purpose. A 2022 meta-analysis of 223 studies found that voluntary slow breathing increased vagally mediated HRV during practice, immediately afterward, and after multi-session programs; the authors described it as a low-cost, low-tech technique for prevention as well as treatment. This measure reflects changes in heart rhythm associated with the vagus nerve’s influence on the heart. An increase may suggest greater parasympathetic activity, although HRV doesn’t measure the nerve directly and should not be interpreted as a complete picture of nervous system activity. In everyday terms, slow breathing may help ease physical tension, quiet a racing mind, and create a greater sense of calm.
In a randomized trial of 108 adults, participants practiced “cyclic sighing” for 5 minutes a day over 28 days. Compared with a mindfulness group that focused on breathing without intentionally changing its pace, the cyclic sighing group reported greater improvements in positive mood and a larger decrease in resting breathing rate. The practice is simple: inhale through your nose, add a second, deeper sip of air to fill your lungs, then exhale slowly through your mouth until your lungs feel empty. Stanford psychiatrist David Spiegel noted that breath sits “right on the edge of conscious control,” which may be why it gives you a way in.
Movement: yoga, tai chi, and physical activity
Movement can be one of the simplest ways to ease stress, and research suggests that a variety of activities can help. An umbrella analysis in the British Journal of Sports Medicine pooled 97 systematic reviews, covering 1,039 trials and more than 128,000 participants. It found moderate average reductions in depression, anxiety, and psychological distress, with yoga and other mind-body exercise among the most effective for anxiety and higher-intensity activity producing larger gains. Although the findings are encouraging, the researchers noted limitations in the available evidence. For the autonomic system specifically, a meta-analysis of 17 randomized trials of yoga and tai chi found small improvements in HRV measures, moderate improvement in an index of sympathetic-vagal balance, and large reductions in perceived stress. Ultimately, the most beneficial activity may be the one you enjoy enough to make a regular part of your life.
Mindfulness: one strong trial
Mindfulness may offer meaningful relief from anxiety. In a randomized trial involving 276 adults with anxiety disorders, 208 completed the study. An eight-week mindfulness-based stress reduction course was found to be about as effective as the antidepressant escitalopram in reducing anxiety symptoms, with average improvements of 1.35 points for mindfulness and 1.43 for the drug. Adverse events were reported far less often with mindfulness (15.4 percent versus 78.6 percent). Participants averaged 33 years old and three-quarters were women, and this was a single trial of a structured course, so it doesn’t mean a week with a meditation app will match a prescription. It does fit with Benson’s earlier observation that deliberately quieting the mind can change how the body responds.
Connection, nature, and music
Meaningful humanconnection may be the most underrated regulator. In one study, researchers exposed 404 healthy adults to a cold virus and examined whether social support helped protect them from getting sick. They found that people who felt more supported were less vulnerable to the effects of interpersonal conflict, with hugs accounting for roughly a third of that protective effect. Among those who became infected, more support and frequent hugs were linked with milder symptoms. Of course, hugs aren’t necessarily a remedy in themselves. They may simply reflect the comfort and security that come from close relationships. Some evidence suggests that feeling safe and supported by others may help calm the body’s stress response.
Spending time outdoors and listening to music can help ease stress. A small 2024 study of 29 adults with moderate stress found lower salivary cortisol and higher HRV after a two-day forest immersion, but it had no control group and combined walking, meditation, and yoga, so it cannot say which element mattered most. Walking barefoot on grass, sand, or soil offers another way to engage with nature, bringing attention to the sensations beneath your feet. This practice, sometimes called grounding or earthing, has also attracted interest for its proposed effects on the body’s electrical activity, although those specific health claims remain scientifically uncertain. A meta-analysis of 47 studies with 2,747 participants found that music therapy reduced physiological stress markers such as blood pressure, heart rate, and cortisol, along with anxiety. Sessions led by qualified music therapists produced larger effects than listening alone.
The hype check: Can you “reset” your vagus nerve?
Social media is filled with claims that you can “reset” your nervous system, or “hack” your vagus nerve, in thirty seconds. The scientific evidence is less definitive. An investigation by The Nerve found influencers promising thirty-second resets and retreat leaders conducting sessions despite lacking formal training. Experts cautioned that these claims lack scientific evidence and that practices that bring up traumatic experiences without professional support can do more harm than good. The Washington Post, in a piece republished by the Philadelphia Inquirer, reported that researchers see exercise, breathwork, and meditation as ways to improve vagal tone, though not as equivalent to the stimulation delivered by a medical device. Neurosurgeon Kevin Tracey, who leads the Feinstein Institutes, is quoted in The Nerve’s investigation saying that what we know about the vagus nerve is “only the tip of the iceberg.”
Part of the confusion traces back to polyvagal theory, a framework developed by Stephen Porges that clinicians and wellness writers often draw on. The theory has faced serious criticism from some researchers, while its developer defends it, so treat polyvagal explanations as a hypothesis rather than established science. Despite these criticisms, practices such as humming, singing, deep breathing, yoga, and spending time with supportive people offer potential benefits and generally carry little risk. The practices in this article do not depend on the theory being right; they rest on their own trial evidence, and the mechanisms may turn out to differ from the popular accounts.
Putting It Together: A Gentler Way to Wind Down
So what might all of this look like in everyday life? Let’s return to that 11 p.m. moment when you’re exhausted but can’t quite unwind. Tonight, sit or lie down and spend five minutes on slow breaths with a long exhale, the pattern used in the cyclic sighing trial. Tomorrow, move in a way that keeps your breath steady, whether that is a walk, yoga, or tai chi, and choose a practice you can return to regularly. This week, protect your sleep as you would a deadline, since a sleep-deprived brain may read ordinary events as more threatening. Try keeping a consistent sleep schedule, getting morning sunlight, winding down before bed, and limiting afternoon caffeine. These habits help reinforce your circadian rhythm, the internal timing system that influences when you feel alert or sleepy. For more ways to support restorative sleep, explore A Voice for Choice Advocacy’s “Sleep Restoration and Deprivation: Investigating Health Impacts in Both Cases.”
Add one dependable source of connection, such as a long hug, a phone call, a visit with someone you trust, and one pleasure that costs nothing, such as time outdoors or listening to music you love. If anxiety or stress keeps interfering with your days, bring a clinician in; therapy has well-established evidence, and a structured mindfulness course held its own against medication in one trial.
Your nervous system isn’t broken, and it isn’t a machine with a single switch. It responds to what you experience, and over time, regular practices can help it settle: a longer exhale, steady movement, enough sleep, people who help you feel secure. Don’t expect a thirty-second reset. Look for something subtler, more like the way the body eases back toward baseline once it believes the danger has passed. The next time it’s 11 p.m. and you’re exhausted but suddenly wide awake, you’ll know where to start.
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Published on October 29, 2026.
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