practice · Tracked item
Carbon dioxide tolerance test
Every recorded take from the experts Cited tracks — each with the exact quote, source, and timestamp.
▲ Strong endorse
2 recommendations across 2 experts · 2 episodes
2 endorse
0 nuanced
0 avoid
Who's on the record
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In a protocol
Morning test: 4 nasal inhale/mouth exhales, then big inhale and exhale as slowly as possible; longer discard time (60-120s) indicates better recovery/parasympathetic capacity.
“carbon dioxide blow-off time
HL▶ 1:24:20Dosage4 nasal inhales/mouth exhales, 5th big inhale, exhale as slow as possible; time it; <25s=poor, 30-60s=green, 65-120s=well recoveredCertaintyexplicitstrong endorsement -
Alternative
Take three normal breaths, then biggest possible inhale, then exhale through pursed lips as slowly as possible while timing; ~60-90 seconds is target.
“take three normal breaths... biggest breath you've ever taken
TR▶ 2:13:00Dosage3 normal nose breaths, max inhale, exhale through pursed lips slowly while timing; target 60-90+ secCaveatsDon't do near water or while drivingCertaintyexplicitrecommendation