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This study validated a treadmill protocol for measuring firefighters' cardiovascular fitness while wearing personal protective equipment (PPE). The occupational-specific test accurately assesses maximal oxygen uptake (VO2max) under realistic work conditions.

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Area of Science:

  • Exercise Physiology
  • Occupational Health

Background:

  • Assessing cardiovascular fitness is crucial for firefighter safety and performance.
  • Existing maximal oxygen uptake (VO2max) protocols may not accurately reflect the physiological demands firefighters face due to personal protective equipment (PPE).

Purpose of the Study:

  • To validate a VO2max testing protocol specifically designed for firefighters, incorporating the use of PPE.
  • To determine the reliability and accuracy of an occupational-specific VO2max assessment.

Main Methods:

  • Career firefighters completed a graded exercise test (GXT) with a square-wave verification bout while wearing firefighter pants and boots.
  • Maximal oxygen uptake (VO2max) was measured during the GXT and verification bout.
  • Results were compared to self-reported physical activity and estimated VO2max equations.

Main Results:

  • The GXT and square-wave verification bout yielded highly consistent VO2max measurements (ICC = 0.98).
  • The typical error and coefficient of variation indicated excellent reliability of the protocol.
  • Measured VO2max values were 41.04 ± 6.98 mL/kg/min for the GXT and 39.74 ± 6.42 mL/kg/min for the verification bout.

Conclusions:

  • An incremental treadmill protocol incorporating PPE and square-wave verification is a valid and reliable method for assessing firefighters' cardiovascular fitness.
  • This occupational-specific tool provides a more accurate measure of VO2max under conditions relevant to firefighting duties.