Does Your Vagus Nerve Affect Your Next Promotion? What the Research Actually Shows

Your vagus nerve does not decide your next promotion, and no study has shown that it does. What the research supports is more modest and more useful: how well you settle after stress affects how clearly you listen, think and decide, and settling is a skill you can practice.

If you have been doing the right things and still watching the promotion go to someone else, it is tempting to look for a hidden biological switch. Many leaders describe the same pattern: a tight chest in a hard meeting, a racing mind at 2 a.m., a sense that they are leading while bracing. This article walks through what the research says about stress, the vagus nerve and leadership, where the evidence is thin, and what you can practice this week.

What the research says about stress and leadership

Leaders are not simply more stressed

Sherman and colleagues (PNAS, 2012) studied real-world leaders, including military officers and government officials. Leaders had lower cortisol and reported less anxiety than non-leaders, and leaders in more powerful positions showed lower levels still. The authors suggest that a greater sense of control may explain part of the pattern.

This is an association. It does not show that a calm body gets you promoted. It may be that authority and control make people calmer. What it does suggest is that feeling a sense of control matters, and that is something you can work on from the inside.

How a leader’s presence may affect a team

Colgate and Colgate (Administrative Sciences, 2025) propose that a coaching style of leadership works partly because cues like a warm tone of voice and attentive listening are picked up below conscious awareness and help other people feel safer. It is a conceptual paper. It analyzes no new data and offers its ideas as propositions for future testing. The idea fits what many people feel in a room with a steady leader, but it remains a hypothesis.

What “vagal tone” does and does not tell you

Vagal tone is often discussed alongside heart rate variability (HRV), the small beat-to-beat changes in your heart rhythm. A 2018 review of 37 publications (Kim and colleagues) found that HRV measures often change under stress, most commonly showing lower parasympathetic activity. The same review found inconsistent results across studies and noted that HRV is also shaped by breathing, posture, age, physical activity, medications and more. HRV is a rough window, not a verdict on your leadership.

The vocabulary of “ventral vagal states” comes from polyvagal theory, which is debated. Grossman (2023, Biological Psychology) challenges its five basic premises. Clinicians writing in the Journal of Psychiatry Reform (2023) describe the theory as scientifically questionable while still finding its self-regulation exercises useful in practice. A fair way to hold it: a helpful language for describing experience, not settled anatomy.

Arousal and decisions: what one 2026 study actually shows

Nuiten and colleagues (Communications Biology, 2026) measured pupil-linked arousal, a physiological marker of alertness, in 28 healthy young men doing a yes or no task: was a faint pattern present in visual noise? Higher baseline arousal was linked to a more liberal bias, meaning more willingness to say “yes, it is there,” and strategic adjustments of bias were weakest during moments of high momentary arousal.

That is a perception experiment. It says nothing about promotions, executives or boardrooms, and the authors note that the pupil findings are correlational. It is a reminder that arousal level can tilt judgment, not evidence about careers.

What to do: five low-risk practices

None of these is a promotion strategy. They are ways to get better at noticing and settling, which can make it easier to use the skills your next role actually rests on: listening, judgment and clear communication.

1. Slow your exhale (3 to 5 minutes)

Breathe in through your nose for about four seconds, then breathe out slowly for six to eight seconds. A 2022 systematic review and meta-analysis by Laborde and colleagues, covering 223 studies, reported increases in vagally mediated HRV with voluntary slow breathing, and described it as a low-cost technique with few adverse effects expected.

In a randomized study (Balban and colleagues, Cell Reports Medicine, 2023), five minutes a day of cyclic sighing for about a month improved mood and lowered respiratory rate more than mindfulness meditation did. Cyclic sighing means a full inhale through the nose, a short second sip of air on top, then a long slow exhale through the mouth. Stop if you feel lightheaded, and check with your doctor first if you have a heart or breathing condition.

2. Orient before the big conversation (1 minute)

Let your eyes move slowly around the room. Name five things you can see. Feel your feet on the floor and notice whether your jaw and shoulders are holding on. No study here promises an outcome. It is a simple way to bring your attention out of racing thoughts and into the room you are actually in.

3. Check in with your body before you decide

Before replying to a tense email or making a big call, pause for ten seconds. Notice your breath, jaw, belly and chest. Noticing the state you are in is the first step to choosing whether to act from it.

4. Move between meetings

Walk for five minutes, or shake out your arms and shoulders. Movement gives your body something to do with the energy of stress. This is a common-sense practice, not a finding from the studies above.

5. Protect your sleep before high-stakes days

A 2025 scoping review of 25 studies (Agyapong-Opoku and colleagues, Behavioral Sciences) found that sleep loss appears to impair decision-making, and many studies reported riskier choices. A few studies, particularly on economic tasks, found no significant effect, so the picture is mixed. If you can, avoid making irreversible decisions on very little sleep.

What the research does and does not show

It does show: stress physiology is linked to how we pay attention and decide; in the leader samples studied, leaders reported lower stress than non-leaders; slow breathing is associated with higher HRV; and in one randomized study a short daily breathing practice improved self-reported mood.
It does not show: that vagal tone or HRV predicts promotion, that any breathing practice causes career outcomes, that polyvagal terms describe literal anatomy, or that a perceptual arousal experiment applies to leaders.
Keep in mind: many of these studies are small, correlational or conceptual, and people differ a lot.

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