Breath Efficiency (BOLT) Test
The BOLT (Body Oxygen Level Test) is a simple breathing assessment that measures how efficiently your body tolerates carbon dioxide (CO₂). It reflects breathing control, respiratory efficiency, and recovery capacity rather than lung size or strength.
The Urban Physio
Body Oxygen Level Test (BOLT) 🫁
Goal: Measure your CO₂ tolerance.
Stop the timer at the FIRST distinct urge to breathe.
Breathe In...
1. Normal breath IN through nose.
2. Normal breath OUT through nose.
3. Pinch nose, hold, tap START.