The Breathe-Less Method
Build CO2 tolerance to deliver more oxygen and boost athletic performance
- Difficulty
- Advanced
- Time to result
- ~months to results
- Steps
- 6
- Confidence
- 82%
The method inverts the intuition that more breathing means more oxygen. Fast, heavy breathing mainly blows off carbon dioxide, which raises blood pH and, via the Bohr effect, makes hemoglobin cling to oxygen rather than release it into cells. By deliberately breathing less — nasal only, slower, with regular breath-holds — you raise your tolerance to CO2. Higher CO2 lets oxygen unbind at the tissues, and the added demand pushes the body to produce more red blood cells (more 'train cars' to carry oxygen). Combined with respiratory-muscle strength and increased vital capacity, the result is that you can work harder while feeling less need to breathe heavily. It is a demand system: consistent stress over months reshapes how efficiently you use every breath.
Origin
Dylan Werner developed this from years of yogic pranayama practice combined with a scientific, citation-driven study of respiratory physiology, focusing the last several months on athletic performance for his book The Illuminated Breath.
Core principles
- 01Breathing more does not deliver more oxygen; it offloads CO2
- 02CO2 is what unlocks oxygen from hemoglobin (the Bohr effect)
- 03Air hunger is a trainable tolerance, like appetite on a diet
- 04The body makes red blood cells on demand for the load you give it
- 05Under-breathing signals adaptation; over-breathing signals waste
How to run it
- 1
Switch to nasal breathing
Breathe through the nose at all times. The nose filters, humidifies, and down-regulates the volume of air, immediately reducing over-breathing.
Pro tip Tape your mouth at night if you tend to mouth-breathe while asleep.
- 2
Slow the breath consciously
Whenever you catch yourself thinking about it, deliberately breathe slower. Awareness of breath volume is the foundational lever.
Pro tip A single deep breath is 6-7x a normal half-litre breath; after one, pause rather than pile on more.
- 3
Add breath-hold retentions
Introduce breath-holds on both the exhale and the inhale. Exhale-holds build CO2 tolerance faster; inhale-holds lower blood oxygen for adaptation. Do both.
Pro tip Werner's sequence: two minutes exhale-hold, two minutes inhale-hold, then 2:30, then 3:00 of each.
Watch out Never practice breath-holds in or near water, or while driving.
- 4
Strengthen the respiratory muscles
Use fast forced-breathing drills to strengthen the diaphragm, intercostals and core. A stronger respiratory muscle works less hard and uses less oxygen during effort.
Pro tip Stronger breathing muscles mean less oxygen spent on breathing itself while running or grappling.
- 5
Train cardio to trigger red-cell demand
Work near the upper end of your cardiorespiratory limit so the body senses it needs more oxygen-carrying capacity and produces more red blood cells over time.
Pro tip Extended sessions past ~15 minutes also trigger splenic contraction, releasing stored red blood cells for a second wind.
- 6
Keep the nose closed under load
During exercise, keep breathing through the nose. If you cannot maintain the effort nasally, slow down until you can, then rebuild speed.
Pro tip Elite runners who switched to nasal training improved times by small but decisive margins.
In the wild
Someone who sits and over-breathes all day signals the body that it has surplus red blood cells, since oxygen keeps returning to the lungs unused. The body stops making as many. When that person tries to run, they are instantly winded because they lack the oxygen-carrying capacity. Training near the cardio limit and breathing less reverses the signal: the body reads genuine demand and builds more 'train cars' to carry oxygen off at the tissues.
→ Restored oxygen-carrying capacity and reduced breathlessness during exertion.
Werner runs a fixed retention sequence: two minutes of exhale-hold, two minutes of inhale-hold, then 2:30 of each, then 3:00 of each. He notes the third round feels easier than the first because the spleen has by then contracted and released extra red blood cells into circulation, illustrating how the body adapts within a single session.
→ Rising CO2 tolerance and a demonstrable within-session performance lift.
Common mistakes
Believing fast breathing gives more oxygen
Blood oxygen saturation is already 95-99%; breathing faster mainly offloads CO2 and changes pH, which actually locks oxygen onto hemoglobin.
Mouth-breathing during exercise
Mouth-breathing means you are already over-breathing; slowing down to stay nasal builds the adaptation instead of masking the deficit.
Expecting results from 15 minutes a day
A short daily practice will not build athletic capacity; like distance running, the adaptation requires sustained volume over months.
Is it for you?
Best for
Athletes and fitness-focused people who want to raise endurance and oxygen efficiency.
Not ideal for
Anyone seeking a quick fix; the adaptation takes months of consistent practice.
From the transcript
“if i breathe more i'm not actually getting more oxygen i'm breathing off more carbon dioxide”
“breathe less breathe through your nose is the first one it's already gonna down regulate how much you're breathing”
“adding more red blood cells does it adds more train cars to the system so that they're able to get more oxygen”
From the episode
How To Breathe Like A Yogi - Dylan Werner - #282
Dylan Werner