My Heart Was Racing So Fast I Could Hear It. Then I Learned This.

I was hyperventilating in the corridor outside the boardroom.

“Just take deep breaths,” my colleague said. So I did. Big, gulping breaths. My heart raced faster. My hands tingled. I felt dizzy. The “calming” advice was making everything worse.

That was 2003, during my second year at JPMorgan. I had three minutes until I had to present quarterly results to 40 people. And I genuinely thought I might pass out.

What I didn’t know then—what took me five more years of presentation terror and eventually training as a clinical hypnotherapist to understand—is that “deep breathing” is dangerously incomplete advice. It’s not the depth of your breath that calms your nervous system. It’s the ratio.

The technique I’m about to share takes 60 seconds. I’ve taught it to hundreds of executives since then. It works every single time—because it’s based on how your nervous system actually functions, not on wishful thinking.Last updated:

January 2026 — with the latest Navy SEALs breathing technique..

In This Article

• Why “Just Breathe Deeply” Makes Anxiety Worse
• The 4-7-8 Technique: Exactly How to Do It
• The Science: Why This Ratio Works
• When to Use It (A Timing Guide)
• The Subtle Version for During Presentations
• FAQs

Why “Just Breathe Deeply” Makes Anxiety Worse

Here’s what happens when you’re anxious: your breathing becomes shallow and rapid. Your body floods with adrenaline. Your heart pounds. Every instinct screams take a big breath.

So you do. You gulp air. Big, deep breaths.

And you feel worse.

This isn’t a failure of willpower. It’s physiology. When you take rapid deep breaths—even if they feel “deep”—you’re hyperventilating. You’re flooding your system with oxygen and depleting carbon dioxide. This triggers more anxiety symptoms: tingling hands, dizziness, racing heart, tight chest.

The exact opposite of what you need.

I spent five years making this mistake before every presentation. Standing in corridors, gulping air, wondering why the “calming technique” everyone recommended was making me feel like I was dying.

The breakthrough came when I trained as a clinical hypnotherapist and learned about the vagus nerve—the master switch for your nervous system’s calm response. The vagus nerve isn’t activated by deep breaths. It’s activated by slow exhales.

That’s the key most breathing advice misses entirely.

The 4-7-8 Technique: Exactly How to Do It

This technique was developed by Dr. Andrew Weil, based on ancient pranayama breathing. Navy SEALs use a variation called “box breathing.” I’ve adapted it specifically for presentation scenarios over 15 years of teaching executives.

Here’s the exact protocol:

Step 1: Empty completely. Exhale through your mouth with a whoosh sound. Push every bit of air out. This is important—you need to start from empty.

Step 2: Inhale quietly through your nose for 4 counts. Don’t rush. Count “one-one-thousand, two-one-thousand” in your head.

Step 3: Hold your breath for 7 counts. This feels long at first. That’s normal. Your body is absorbing oxygen properly instead of cycling it too fast.

Step 4: Exhale completely through your mouth for 8 counts. Make the whoosh sound. This extended exhale is where the magic happens—it directly activates your vagus nerve and forces your heart rate down.

Repeat for 3-4 cycles. Total time: less than 90 seconds.

The ratio is 1:1.75:2. The exhale is twice as long as the inhale. This isn’t arbitrary—it’s the ratio that shifts your nervous system from sympathetic (fight-or-flight) to parasympathetic (rest-and-digest).

For more techniques on managing the mental side of pre-presentation nerves, see my guide on what senior leaders actually do for high-stakes presentation nerves.

The Science: Why This Ratio Works

Your autonomic nervous system has two modes:

Sympathetic: Fight-or-flight. Heart races, breathing quickens, blood flows to muscles. Useful if you’re running from a predator. Terrible if you’re about to present quarterly results.

Parasympathetic: Rest-and-digest. Heart slows, breathing deepens, mind clears. This is where confident presenting happens.

The vagus nerve is the switch between these modes. And here’s the critical insight: exhaling stimulates the vagus nerve more than inhaling. That’s why the 4-7-8 ratio works—the exhale is twice as long as the inhale, giving your vagus nerve maximum activation.

The 7-count hold serves a different purpose. When anxious, you’re cycling air too fast. The hold forces your body to actually absorb the oxygen you’ve taken in, rather than immediately expelling it and gulping more.

This isn’t meditation. It’s not “mindfulness.” It’s a direct physiological intervention that works whether you believe in it or not.

If you want the complete nervous system reset toolkit—including audio guides you can use in the moment—Calm Under Pressure gives you everything I’ve learned in 24 years of managing presentation anxiety.

When to Use It: A Timing Guide

Timing matters more than most people realise. Here’s exactly when to use the 4-7-8 technique for maximum effect:

The night before (if you’re already anxious): Do 4 cycles before bed. This isn’t about the presentation—it’s about training your nervous system to respond to the technique. The more you practice in calm moments, the faster it works in crisis moments.

Morning of the presentation: Do 4 cycles when you wake up, before the anticipatory anxiety has time to build. Another 4 cycles before you leave for work.

5 minutes before: Find a quiet space. Bathroom, empty office, stairwell, your car. Do 4 complete cycles. This is your primary reset.

2 minutes before: Do 2 cycles while walking to the room. Nobody will notice—you’re just walking and breathing.

Seated at the table, waiting to start: Do 1 subtle cycle as others settle in. (See the subtle version below.)

During Q&A: While someone else asks a question, you have 15-20 seconds. One complete cycle. This is especially useful if you’ve just been asked something difficult and need to compose yourself before answering.

The Subtle Version for During Presentations

You can’t do full 4-7-8 breathing while you’re actively presenting. But there’s a subtle version that works without anyone noticing.

The “Question Pause” technique:

When someone asks you a question—or when you’re transitioning between slides—pause as if you’re considering your response thoughtfully. During this pause:

1. Take a slow breath in (2-3 counts, not 4)
2. Brief hold (1-2 counts)
3. Slow exhale through your nose (4-5 counts)

Total time: 8-10 seconds. To observers, you look thoughtful and measured. Inside, you’re resetting your nervous system.

This is particularly powerful because most anxious presenters rush to fill silences. The pause actually makes you look more confident while giving you the physiological reset you need.

If your voice tends to shake when presenting, I’ve written a detailed guide on how to stop voice shaking when speaking that pairs well with these breathing techniques.

The subtle techniques take practice. Calm Under Pressure includes audio-guided practice sessions so you can train these responses before you need them.

What If 4-7-8 Feels Too Long?

Some people find the 7-count hold uncomfortable, especially when they’re already anxious. That’s fine—there’s a shorter version that still works.

The 4-4-6 variation:

• Inhale for 4 counts
• Hold for 4 counts
• Exhale for 6 counts

The key principle remains: exhale longer than you inhale. As long as you maintain that ratio, you’ll activate the vagus nerve response.

Start with 4-4-6 if you’re new to breathwork. Once it feels natural, progress to 4-7-8 for stronger effect.

For Video Calls and Virtual Presentations

Virtual presentations have one advantage: nobody can see you from the waist down. Use this.

Before your camera turns on, do your full 4-7-8 cycles. During the call, you can do subtle breathing without anyone noticing—especially when your microphone is muted.

One technique I teach executives: keep your hand resting on your stomach (below camera frame). This lets you feel your breath moving correctly—expanding on inhale, contracting on exhale—while looking completely natural on camera.

For comprehensive virtual presentation strategies, see my guide on how to calm nerves before a presentation.

FAQs

How do you breathe to calm nerves before a presentation?

Use the 4-7-8 technique: inhale quietly through your nose for 4 counts, hold for 7 counts, exhale completely through your mouth for 8 counts. The extended exhale activates your vagus nerve, which directly slows your heart rate and shifts your nervous system from fight-or-flight to calm. Do 3-4 cycles five minutes before presenting for maximum effect.

Why does deep breathing sometimes make presentation anxiety worse?

When anxious, people take rapid deep breaths, which causes hyperventilation—too much oxygen, depleted carbon dioxide. This increases symptoms like tingling, dizziness, and racing heart. The solution isn’t breathing deeply; it’s breathing slowly with an exhale longer than your inhale. That’s why the 4-7-8 ratio works when generic “deep breathing” fails.

What is the 4-7-8 breathing technique?

The 4-7-8 technique involves inhaling for 4 counts, holding for 7 counts, and exhaling for 8 counts. Developed by Dr. Andrew Weil based on yogic breathing, the ratio (1:1.75:2) is specifically designed to activate the parasympathetic nervous system. The extended exhale stimulates the vagus nerve, which controls your body’s calm response.

Can I use breathing techniques during a presentation without anyone noticing?

Yes. Use the “Question Pause” technique: when asked a question, pause as if considering your response, then take a slow breath in (2-3 counts), brief hold (1-2 counts), and slow exhale through your nose (4-5 counts). Total time: 8-10 seconds. To observers, you look thoughtful and measured. This works especially well during Q&A sections.

Related: High-Stakes Presentation Nerves: What Senior Leaders Actually Do

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Mary Beth Hazeldine spent 24 years in corporate banking at JPMorgan Chase, PwC, Royal Bank of Scotland, and Commerzbank. She’s a qualified clinical hypnotherapist and NLP practitioner, and MD of Winning Presentations. She overcame five years of severe presentation anxiety using the techniques she now teaches.