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The steady-state load of five firefighting tasks.

Jon Ingulf Medbø1, Asgeir Mamen1,2, Harald Oseland3

  • 1Faculty of Education, Arts and Sports, Western Norway University of Applied Sciences, Norway.

International Journal of Occupational Safety and Ergonomics : JOSE
|January 22, 2019
PubMed
Summary

Firefighting tasks significantly increase physiological demands, with ladder climbing being the most strenuous, exceeding 90% of aerobic capacity. These findings highlight the varied physical exertion firefighters endure.

Keywords:
blood lactate concentrationexercisefirefightingheart rateladder climbinglung ventilationoxygen uptakerating of perceived exertion

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Area of Science:

  • Occupational physiology
  • Exercise science
  • Firefighter health

Background:

  • Firefighting involves physically demanding tasks.
  • Understanding the physiological strain is crucial for firefighter safety and performance.

Purpose of the Study:

  • To quantify the physiological demands of five common firefighting tasks.
  • To compare the intensity of different tasks under simulated conditions.

Main Methods:

  • Eight male volunteers performed five tasks (walking, carrying loads, ladder climbing) for 5 minutes each.
  • Physiological parameters including heart rate, oxygen uptake, and lung ventilation were continuously measured.
  • Blood lactate concentration was assessed post-task.

Main Results:

  • Physiological demands increased progressively across tasks, with heart rate rising to 180 bpm and oxygen uptake to 48 ml·kg⁻¹·min⁻¹.
  • Ladder climbing represented the most intense activity, utilizing over 90% of subjects' aerobic power.
  • Tasks involving carrying loads (ladder, hose packs, spreader tool) significantly elevated exertion levels.

Conclusions:

  • The physiological demands of firefighting tasks vary considerably.
  • Ladder climbing and tasks with heavy loads impose substantial aerobic stress on firefighters.
  • Simple walking, even with protective gear, presented lower physiological challenges.