How Breathwork and the Vagus Nerve Help Calm Anxiety

This post is co-authored by Monique Brewster, founder and yoga instructor at Maisha Haus, and the clinical team at Cognitive Reset Counseling. Monique is a guest contributor and not a member of CRC's clinical staff.

A lot of the work done in cognitive therapy is helping someone notice the thought before it spirals, the story they're telling themselves before it takes over. That work happens in the mind, but anxiety doesn't stay in the mind. It shows up in the body too, often before we're even aware of what we're thinking. Your chest gets tight. Your shoulders creep up. Your breath gets short and shallow, or you catch yourself holding it altogether without realizing you started.

That physical response and the anxious thought are part of the same loop. One feeds the other. So the breath isn't just a side effect of anxiety, it's also one of the more direct ways back into a calmer state, and it's something you can access on your own between sessions. This is where breathwork, and yoga more specifically, becomes a useful tool alongside the cognitive work happening in therapy.

When I went through my yoga teacher training, I expected to spend most of my time learning poses. What actually stuck with me had almost nothing to do with how a pose looks and everything to do with how it's powered.

One of the first things we were taught is that the breath leads the movement, not the other way around. If you find yourself holding your breath or gasping for air to get into a shape, you're no longer practicing yoga. You might be doing something that looks like yoga, but the practice itself has already stopped.

That's because of prana. In Sanskrit, prana literally means breath, or life force. It's the thing that's actually driving the practice. The pose is just the outer shell. The moment you lose your connection to the breath, it doesn't matter how deep the backbend is or how impressive the arm balance looks. You've left the practice behind, even though your body is still on the mat.

We were also taught the difference between discomfort and pain. Discomfort is normal in a stretch. Pain is not, and pain is actually a late signal. By the time you feel real pain in a pose, your body has already been telling you for a while that you've gone too far. The breath is what changes first. It gets shallow, ragged, or held before the pain shows up. If you're paying attention to your breath, you catch that you're pushing past your limit long before your body has to escalate to pain to get your attention.

This applies far beyond the mat. The moment your breath changes in a stressful situation, your body is already signaling to you that you're entering a stress response, whether it's a hard conversation, a deadline, or a thought spiraling out of control. That happens before the heart palpitations, before the headache, before the emotional reaction takes over. The breath leads. If you can catch it there, you often don't have to wait for the later, louder signals to know something needs to shift.

I think about this constantly outside of class. We move through our days forgetting how much the breath is doing for us. We hold it when we're concentrating, when we're bracing for bad news, when we're anxious and don't even realize it. Most of us have no idea we're doing it until someone points it out or our shoulders are up around our ears by 3pm. The breath is quietly running the show for our nervous system, whether we're paying attention to it or not.

Heart Rate Variability Breathing and Why It Matters

That marker mentioned above, heart rate variability, isn't just a yoga concept. It's something clinicians measure directly. Cognitive Reset Counseling actually offers HRV Coherence Training as part of their integrative approach, using the same heart rate variability breathing principles to help clients build nervous system regulation they can feel and track over time. If this is a piece of your anxiety picture, it's worth exploring what that looks like clinically, not just on the mat.

The Research Backs This Up

This isn't just something yoga teachers say to sound wise. There's a real, growing body of research behind it. A systematic review and meta-analysis published in Depression and Anxiety (Cramer et al., 2018) looked specifically at yoga's effect on anxiety and found meaningful reductions, especially compared to inactive control groups. Other reviews have found similar effects on depression and stress, particularly with practices that emphasize breath and slower, more meditative movement, like yoga nidra for anxiety and restorative practice (Ghai et al., 2026, Annals of the New York Academy of Sciences).

None of this means yoga is a replacement for therapy or treatment. But it does mean the thing your body does on the mat, slowing the breath down and syncing it with movement, is doing real, measurable work on your nervous system. It's not just a feeling. It shows up in the data.

You Don't Have to Be Flexible to Get This

Here's what I want people to hear most: you do not need to be able to touch your toes, hold a handstand, or push your body into an intense practice to get any of these benefits. That version of yoga gets a lot of attention, but it's not the only version, and honestly, it's not even the most important one.

A yin or restorative class will get you there just as effectively, sometimes more so. These are the classes where poses are held for minutes instead of seconds, where props are doing most of the work, and where the entire point is to slow down enough to actually feel your breath instead of performing it. If a vigorous flow class sounds intimidating, or like the opposite of relaxing, that's a sign to try something gentler, not a sign that yoga isn't for you.

The nervous system doesn't care how advanced the pose is. It responds to the breath. A long exhale in a supported forward fold is doing the same quiet work on your vagus nerve as a long exhale in a more demanding pose. Slowing down is not a lesser version of the practice. For a lot of people managing anxiety, it's the version that actually works.

If you're already doing the work of noticing and reshaping anxious thought patterns in [anxiety therapy], breathwork gives you a second lever to pull, one that works on the body directly instead of through the mind. You don't have to choose between them. A regulated nervous system makes it easier to catch an anxious thought before it takes hold, and catching the thought makes it easier to come back to the breath. They support each other. This kind of body based work is also part of what's explored in somatic therapy, for anyone who wants to go deeper into how the nervous system holds and releases stress.

If you're trying to figure out whether what you're feeling is anxiety, burnout, or both, our post on Burnout vs. Anxiety: What's the Difference? breaks down how to tell them apart.

Curious what this looks like with professional support behind it? Book a free 15 minute consult with Cognitive Reset Counseling, in person in Greenpoint, Brooklyn or virtually across New York State.

Author bios:

Monique Brewster is the founder and yoga instructor at Maisha Haus, where she teaches classes focused on breath, restorative movement, and nervous system support. Visit themaishahaus.com or follow @maishahaus on Instagram to learn more.

Stephanie Sanz, LMHC-D, is the Founder and Clinical Director of Cognitive Reset Counseling, a group therapy practice in Greenpoint, Brooklyn serving clients in person and across New York State. The clinical team supports clients navigating anxiety, depression, stress, burnout, and trauma, including HRV Coherence Training and other nervous system focused approaches referenced in this post.

References:

Cramer, H., Lauche, R., Anheyer, D., Pilkington, K., de Manincor, M., Dobos, G., & Ward, L. (2018). Yoga for anxiety: A systematic review and meta-analysis of randomized controlled trials. Depression and Anxiety, 35(9), 830 to 843.

Russo, M. A., Santarelli, D. M., & O'Rourke, D. (2017). The physiological effects of slow breathing in the healthy human. Breathe, 13(4), 298 to 309.

Ghai, S., et al. (2026). Effects of yoga nidra on stress, anxiety, and depression: A systematic review and meta-analysis. Annals of the New York Academy of Sciences.