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bolt test

technique 1 mention from 1 sources

A breathing test to measure CO2 tolerance by timing breath-holding after normal breathing

health assessment co2 tolerance breathing test
1

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Mentioned by

James Nestor

All mentions

James Nestor mentioned ✓ High confidence
"There's a simple and easy way also to test your CO2 tolerance called the bolt test. I'm going to use Brian McKenzie's test, which is even better because people cheat with the bolt test."
From: This Breathing Technique Will TRANSFORM Your Health In DAYS | James Nestor • ▶ 2:12:28 • Feb 2026

Attribution: James Nestor mentions the bolt test but notes that Brian McKenzie's version is better