CO2 Tolerance Test — 60-Second Protocol

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biohack · 2026-07-21

Here's a one-minute test of how calm your breathing really is.

After a normal breath out, hold your breath and time how long until the first strong urge to inhale. Under 20 s = low tolerance, 20–40 s = average, > 40 s = high. Track monthly. Long holds correlate with calmer breathing patterns at rest.

Evidence: low CO2 tolerance baseline self-tracking marker

The protocol

Testexhale normally, hold, time first strong urge to inhale
Frequencyonce per month
Interpretation<20s low, 20-40s average, >40s high

Skip this if

  • anxiety triggered by breath holds
  • pregnancy (skip)

Full transcript

Here's a one-minute test of how calm your breathing really is. Breathe out normally, then hold — and time how long until the first strong urge to inhale. Under twenty seconds is low, over forty is high. Check it once a month; longer holds tend to come with calmer, steadier breathing at rest. More protocols like this on agegen.ai. Generate your prime age!

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Educational content, not medical advice. Talk to a licensed clinician before changing how you treat a health condition.