MBT Assessment

Maximum Breathlessness Test - Measure your breath-hold capacity during movement

What is the MBT?

The Maximum Breathlessness Test (MBT) measures your ability to hold your breath while walking. It complements the BOLT score by assessing your hypoxic tolerance during movement.

BOLT Score

Measures comfortable breath-hold time at rest. Indicates baseline CO2 tolerance.

MBT Score

Measures breath-hold capacity during movement. Shows functional fitness level.

How to Perform the Test

  1. 1

    Walk at a normal pace

    Find a flat area where you can walk comfortably for at least 100 paces.

  2. 2

    Take a normal breath in and out

    Breathe gently through your nose. Do not take a deep breath.

  3. 3

    Pinch your nose and hold your breath

    Continue walking while holding your breath.

  4. 4

    Count your paces

    Count each step until you feel a strong urge to breathe.

  5. 5

    Resume nasal breathing

    When you must breathe, release and breathe through your nose. Your first breath should be calm.

Safety Precautions

  • Do NOT perform this test if you are pregnant, unwell, or have been advised against breath-holding
  • Stop immediately if you feel dizzy, lightheaded, or experience any discomfort
  • Do not push to the point of significant distress
  • Perform in a safe environment away from traffic or hazards
  • Have someone nearby if this is your first time

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