Why Navy SEALs Use Box Breathing (And Why 5-20-5 is Better for Urges)
Technique
6 min read

Box Breathing vs 5-20-5: Which Technique Actually Works Better for Urge Control?

H
Halto Research Team
Updated December 2025

If you've looked into breathing techniques for stress or urge control, you've probably come across box breathing. It's the technique Navy SEALs use.

If you've looked into breathing techniques for stress or urge control, you've probably come across box breathing. It's the technique Navy SEALs use. It's everywhere in wellness content. And honestly? It's pretty effective.

But then there's the 5-20-5 technique—less famous, but specifically designed for controlling urges.

So which one should you use? After researching both and testing them extensively, I have some thoughts.

The Quick Answer

For general stress and anxiety: Box breathing is excellent and well-researched.

For acute urge control: The 5-20-5 technique is more effective because of the extended breath hold.

Let me explain why.

What Is Box Breathing?

Box breathing (also called "tactical breathing" or "square breathing") is simple:

  1. Inhale for 4 seconds
  2. Hold for 4 seconds
  3. Exhale for 4 seconds
  4. Hold for 4 seconds

Repeat for several cycles.

It's called "box" breathing because the four equal phases form a square pattern. The technique was popularized by the US Navy SEALs and has since spread throughout military, athletic, and wellness communities.

The science: Box breathing works by activating the parasympathetic nervous system (the "rest and digest" response). The controlled, rhythmic breathing sends signals to your brain that everything is okay, reducing stress hormones and calming the fight-or-flight response.

A 2017 study in Frontiers in Psychology found that slow, controlled breathing patterns like box breathing significantly reduced cortisol levels and self-reported anxiety.

What Is the 5-20-5 Technique?

The 5-20-5 technique takes a different approach:

  1. Inhale for 5 seconds
  2. Hold for 20 seconds
  3. Exhale for 5 seconds

That's one 30-second cycle.

Notice the key difference? The breath hold is five times longer than in box breathing.

The science: The extended breath hold does something special. When you hold your breath for 20 seconds, CO2 builds up in your bloodstream. This triggers a shift in blood flow—away from arousal regions and toward the prefrontal cortex (your decision-making center).

Research published in Frontiers in Human Neuroscience (2018) showed that extended breath holds activate the parasympathetic nervous system more powerfully than standard breathing patterns, with measurable effects within a single cycle.

The Key Difference: Why the Hold Duration Matters

Here's what I've come to understand after researching both techniques:

Box breathing is great for general stress reduction. It calms you down over several minutes of practice. Think of it as a "slow burn" relaxation technique.

The 5-20-5 technique is designed for immediate urge interruption. That 20-second hold creates enough CO2 buildup to meaningfully shift your physiological state in one cycle—about 30 seconds.

When an urge hits, you don't have time for a 10-minute breathing session. You need something that works now. That's where the extended hold comes in.

The Physiology

Let me get a bit nerdy here, because this is interesting:

During a 4-second hold (box breathing):

  • Slight CO2 increase
  • Mild parasympathetic activation
  • Effect builds gradually over multiple cycles

During a 20-second hold (5-20-5):

  • Significant CO2 increase
  • Strong parasympathetic activation
  • Blood flow redistribution
  • Noticeable calming effect within one cycle

Dr. Andrew Huberman, a neuroscientist at Stanford, has discussed how longer breath holds (in the 15-30 second range) create a more pronounced physiological shift. The body interprets the rising CO2 as a signal to calm down and conserve oxygen—which activates the parasympathetic response more strongly.

My Personal Experience Testing Both

I've used both techniques extensively. Here's what I've noticed:

Box breathing is excellent for:

  • General anxiety before stressful situations
  • Calming down after something upsetting
  • Building a regular meditation/breathing practice
  • Improving sleep

It takes me about 4-5 cycles (roughly 1.5 minutes) to notice a meaningful shift in my state.

5-20-5 is excellent for:

  • Acute urges and cravings
  • Moments when I feel an impulse about to take over
  • Times when I need fast intervention
  • Breaking automatic behavior patterns

One cycle (30 seconds) creates a noticeable shift. The urge doesn't disappear, but its intensity drops significantly.

Here's an analogy: box breathing is like slowly turning down the heat on a stove. The 5-20-5 technique is like hitting the kill switch.

Both are useful. They serve different purposes.

When to Use Each Technique

Use Box Breathing When:

  • You have time for a longer practice
  • The stress is background/chronic, not acute
  • You're building a regular breathwork habit
  • You want something to practice daily
  • The urge isn't intensely immediate

Use 5-20-5 When:

  • An urge is hitting right now
  • You need fast intervention
  • The impulse feels overwhelming
  • You're about to do something you'll regret
  • Time is limited

In my experience, having both in your toolkit is ideal. I do box breathing as a daily practice (5 minutes in the morning). I use 5-20-5 when urges or strong impulses hit.

The Learning Curve

Let me be honest about something: the 5-20-5 technique is harder at first.

Holding your breath for 20 seconds isn't comfortable, especially if you're not used to it. The first few times I tried it, I couldn't make it to 20 seconds without feeling like I was going to burst.

Box breathing is much more accessible. Four seconds of breath-hold is easy for most people.

But here's the thing: the discomfort of the 5-20-5 technique is part of why it works. That mild discomfort redirects your attention away from the urge and toward the breath. It gives your brain something immediate to focus on.

Apps like Halto make this easier by using haptic feedback to guide you through each phase. The vibrations help you stay focused and maintain the timing without watching a clock.

Building Up to 20 Seconds

If a 20-second hold feels impossible right now, don't worry. You can build up to it:

Week 1: 5-10-5 (10-second hold) Week 2: 5-15-5 (15-second hold) Week 3: 5-20-5 (full technique)

Halto's is designed around this progression, starting with shorter holds and gradually building your capacity.

With practice, 20 seconds becomes comfortable. Some people eventually work up to 30, 40, or even 60-second holds—though 20 seconds is generally sufficient for urge interruption.

Combining Both Techniques

Here's a protocol that combines both techniques effectively:

Daily practice (build baseline):

  • 5 minutes of box breathing each morning
  • Builds general self-regulation capacity

Acute moments (interrupt urges):

  • One or more cycles of 5-20-5
  • Use when impulses or cravings hit

Recovery (after challenging moments):

  • Return to box breathing
  • Helps restore calm after the urge passes

This gives you the long-term benefits of regular practice plus the acute intervention capability when you need it.

What the Research Says

Both techniques have scientific support, though box breathing has been studied more extensively (largely due to military interest):

Box breathing research:

  • Reduces cortisol and anxiety (multiple studies)
  • Improves heart rate variability
  • Used effectively in military and first responder training
  • Generally takes multiple minutes to show effect

Extended breath hold research:

  • Stronger parasympathetic activation than standard breathing
  • Faster onset of effect
  • Changes blood flow patterns
  • CO2 tolerance builds with practice

A 2019 systematic review in Breathe noted that breath-hold techniques showed promise for acute intervention scenarios, though more research was needed specifically on urge control applications.

FAQ

Can I do too much breath holding? For most healthy adults, extended breath holds are safe. However, if you have respiratory conditions, cardiovascular issues, or are pregnant, consult a doctor first. And never practice breath-holding while driving or in water.

Which technique is easier to learn? Box breathing is definitely more accessible for beginners. The equal four-second phases are easy to remember and execute.

Can I modify the timing? Yes. The 5-20-5 timing is based on research, but you can adjust based on your capacity. The key is maintaining a significantly longer hold phase than inhale/exhale phases.

How many cycles should I do? For box breathing: 4-6 cycles minimum to feel effects. For 5-20-5: often 1-2 cycles is enough for urge interruption, though you can do more if needed.

Is one technique "better" than the other? No—they serve different purposes. Box breathing is better for general stress and daily practice. 5-20-5 is better for acute urge intervention.

The Bottom Line

Both box breathing and the 5-20-5 technique are valuable tools. They're not competitors—they're complementary.

If you're primarily dealing with general stress and anxiety, box breathing is an excellent daily practice. It's accessible, well-researched, and effective over time.

If you're struggling with acute urges, cravings, or impulses that need immediate intervention, the 5-20-5 technique is specifically designed for that purpose. The extended breath hold creates a faster, stronger physiological shift.

The best approach? Learn both. Use box breathing as your daily practice. Keep 5-20-5 as your emergency tool.


Quick Comparison

AspectBox Breathing5-20-5 Technique
Pattern4-4-4-45-20-5
Total cycle16 seconds30 seconds
Hold duration4 seconds20 seconds
Best forGeneral stressAcute urges
Time to effect1-3 minutes30 seconds
DifficultyBeginner-friendlyModerate
Research baseExtensiveGrowing

Key Takeaways

  • Box breathing (4-4-4-4) is excellent for general stress reduction and daily practice
  • The 5-20-5 technique is designed specifically for acute urge interruption
  • The extended 20-second hold creates stronger parasympathetic activation
  • Both techniques have scientific support
  • Use box breathing for daily practice, 5-20-5 for acute moments
  • You can build up to 20-second holds gradually over 2-3 weeks

Need guidance with the 5-20-5 technique? Halto uses haptic feedback to guide you through each phase—inhale, hold, exhale. The progressive 10-level system builds your breath-hold capacity over time. Free on iOS.

H

About the Author

The Halto Research Team comprises behavioral psychologists, neuroscience researchers, and addiction recovery specialists dedicated to solving digital impulse control.

Research-backed methodologiesClinical advisory oversightData-driven recovery protocols
Breathing Comparison Technique

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