CO2 Tolerance Test — Monthly
After a normal exhale, hold and time the first strong urge to inhale: under 20 s low, 20–40 s average, over 40 s high. Track monthly.
After a normal breath out, hold your breath and time how long until the first strong urge to inhale — under 20 s is low tolerance, 20–40 s average, over 40 s high — and track it monthly. Long holds correlate with calmer breathing patterns at rest.
Watch the 23-second version
Here's a one-minute test of how calm your breathing really is.
Transcript & sources → All videosMr. Age is AgeGen's editorial character. Facts come from the protocol above.
The protocol
- Test: exhale normally, hold, time first strong urge to inhale.
- Frequency: once per month.
- Interpretation: <20s low, 20-40s average, >40s high.
What you get
- A CO2 tolerance baseline.
- A self-tracking marker you can follow over time.
Contraindications
- Anxiety triggered by breath holds.
- Pregnancy (skip).
Evidence level
Low. This is a simple self-tracking marker with limited formal validation; treat the number as a personal trend line, not a clinical measurement, and keep it as a low-risk experiment.
Related protocols
Sources
AgeGen never invents studies and never recommends prescription drugs by brand. Biohacks are experiments, not prescriptions — honour the contraindications and talk to a clinician if a condition above applies to you.
