More Energy
Better CO₂ tolerance supports efficient oxygen delivery to your cells, fewer afternoon crashes, steadier energy.
FREE · 1 MINUTE · NO SIGNUP
Curious how well you breathe? Find out in 60 seconds.
BOLT stands for Body Oxygen Level Test, a gentle 1-minute breath-hold used by breathing coaches around the world. It quietly reveals how your body handles oxygen, CO₂, and stress, the same hidden signal shaping your energy, sleep, focus, and recovery. No app. No equipment. Just you and one honest moment with your breath.
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Why Your BOLT Score Matters
A simple window into how well you breathe.
The BOLT score is a breath-hold test popularized by Patrick McKeown and the Oxygen Advantage® method, with roots in the Buteyko Method developed by Dr. Konstantin Buteyko in the 1950s. It gives feedback on your CO₂ tolerance, breathing efficiency, and functional breathing, not a literal oxygen reading.
Calmer Sleep
Light, nasal breathing during sleep is linked to deeper rest and waking up feeling more recovered.
Faster Recovery
Improved breathing efficiency can help your nervous system settle and your body recover between efforts.
Sharper Focus
Your brain uses about 20% of the body's oxygen. Functional breathing supports clear, steady focus.
How the BOLT Test Works
Three steps. Two minutes. One simple number to start with.
The protocol follows the Oxygen Advantage® BOLT method taught by Patrick McKeown.
01
Breathe Normally
Sit comfortably. Take a normal, gentle breath in and out through your nose, no deep inhaling.
02
Exhale & Hold
After a normal exhale, gently hold your breath. The timer starts automatically.
03
Tap at First Urge
The moment you feel the first urge to breathe, that subtle pulling sensation, tap the button. That's your BOLT score.
What Your Score Means
Your score isn't good or bad, it's a starting point.
BOLT scores are typically grouped into five zones based on the work of Patrick McKeown and the Oxygen Advantage® method. Wherever you land today, your 7-Day Breathing Reset gives you a clear next step.
0–10
Very Low
Body running on empty. Common with chronic stress, mouth breathing, fatigue.
10–20
Low
Meaningful room to improve. Most people start here. Small changes = big results.
20–30
Moderate
Average for most adults. Energy and recovery have room to climb.
30–40
Good
Above average. You're handling oxygen efficiently, most athletes train here.
40+
Excellent
Elite territory. Strong respiratory control, fast recovery, sharp focus.
What You'll Get, Free
A 7-day plan to retrain your breathing, and free access to our full training.
Take your BOLT score, and we'll send you everything you need to start improving it tomorrow.
- The 7-Day Breathing Reset PDF guide
- Free BOLT Score Training course on O₂Pro Academy
- Your personalized score interpretation by email
- Daily practice prompts to keep you on track
Go Deeper, 100% Free
Loved your BOLT result? There's a whole free training waiting for you.
Your score is only the beginning. Over on O2andYou, the friendly team at the O₂Pro Academy built a free, self-paced training that walks you through what your number actually means, why it matters for daily life, and the simple practices that gently move it, and how you feel, in the right direction.
Understand your score
Plain-English breakdown of what your BOLT number really says about your breathing, no jargon, no fitness gatekeeping.
Learn the daily habits
Short, gentle breathing practices you can do in bed, at a desk, or on a walk. Most people feel the difference within a week.
Earn your free CAT™ certification
Walk away with a real, named certification at your own pace. No upsell, no credit card. Just curiosity and 10 minutes a day.
Open the Free Training
Hosted on O2andYou · Self-paced · No credit card
Common Questions
What people actually ask about the BOLT test.
BOLT stands for Body Oxygen Level Test. Despite the name, it doesn't literally measure your blood oxygen like a pulse oximeter. It's a simple breath-hold after a normal exhale that gives feedback on your CO₂ tolerance, breathing efficiency, and functional breathing.
No. A regular breath-hold tests willpower. The BOLT test measures the moment you feel the first urge to breathe, not how long you can fight through it. That's why it's a more useful signal of breathing efficiency.
According to Patrick McKeown and the Oxygen Advantage® method, a comfortable target for a healthy adult is around 40 seconds. Most adults score between 15 and 25 seconds, meaning there's significant room to improve.
Yes, often quickly. Consistent nasal breathing, breath-light exercises, and CO₂ tolerance practice can raise scores within weeks. Our 7-Day Breathing Reset gives you a starting protocol.
The BOLT test builds on respiratory chemosensitivity research dating to the 1970s and on the Buteyko Method, a breathing retraining technique developed by Ukrainian physician Dr. Konstantin Buteyko in the 1950s. It was formalized and popularized in its current form by Patrick McKeown through the Oxygen Advantage® method. A 2024 paper in Frontiers in Physiology notes BOLT is proposed to reflect CO₂ sensitivity and functional breathing, but it is not a substitute for VO₂ max or formal aerobic fitness testing. Treat your score as useful feedback, not a diagnosis.
No. Just your phone or computer. Our interactive test guides you through every step, including the breathing pacer, the timer, and the score interpretation.
Credits & Sources
We didn't invent the BOLT score, we just made it easy to take.
myBOLTscore is a free education tool built on decades of breathing science. We want to give credit where it belongs.
Patrick McKeown & Oxygen Advantage®
The BOLT (Body Oxygen Level Test) in its modern form was formalized and popularized by Patrick McKeown through the Oxygen Advantage® method. The test protocol, scoring ranges, and training approach used here follow his published work.
Learn more: oxygenadvantage.com/pages/bolt-score-test · How to Measure Your BOLT Score
Dr. Konstantin Buteyko & the Buteyko Method
The underlying principles, that chronic over-breathing reduces CO₂ tolerance and that breath-hold time reflects functional breathing, come from the Buteyko Method, a breathing retraining technique developed in the 1950s by Ukrainian physician Dr. Konstantin Buteyko.
What the research says
A 2024 paper in Frontiers in Physiology notes that BOLT is proposed to reflect CO₂ sensitivity and functional breathing, but cautions it should not be treated as a substitute for VO₂ max or formal aerobic fitness testing.
myBOLTscore is for education only and is not medical advice, diagnosis, or treatment. Oxygen Advantage® is a registered trademark of its respective owner; this site is not affiliated with or endorsed by Oxygen Advantage®.
Your number is waiting for you.
Two minutes from now, you'll have a simple starting point for understanding your breathing efficiency, CO₂ tolerance, and recovery potential.