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The Acute Effect of High-Intensity Resistance Training on Subsequent Firefighter Performance.

M Ryan Mason1, Nicholas R Heebner2, John P Abt3

  • 1Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky.

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|February 2, 2023
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Summary
This summary is machine-generated.

High-intensity resistance training (HIRT) significantly impairs firefighter performance immediately after exercise. Recovery is varied, with some firefighters still affected 60 minutes post-HIRT.

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Area of Science:

  • Occupational Health
  • Exercise Physiology
  • Firefighter Performance Science

Background:

  • Structural firefighters commonly engage in high-intensity resistance training (HIRT) to enhance occupational readiness.
  • Exercise-induced fatigue from HIRT may potentially compromise subsequent job performance.
  • Understanding the acute effects and recovery time course of HIRT on firefighter tasks is crucial.

Purpose of the Study:

  • To evaluate the immediate impact of HIRT on the occupational physical ability of structural firefighters.
  • To determine the time course of performance recovery following an acute HIRT session.
  • To assess how HIRT affects key performance metrics during a simulated fireground test.

Main Methods:

  • Seven resistance-trained male firefighters participated in a randomized controlled study.
  • Participants completed a simulated fireground test (SFGT) under three conditions: baseline, 10 minutes post-HIRT, and 60 minutes post-HIRT.
  • Performance was measured by SFGT completion time, work efficiency, and air depletion, with statistical analysis using repeated measures ANOVA and minimal difference analysis.

Main Results:

  • SFGT completion time was significantly longer 10 minutes after HIRT compared to baseline (p < 0.01).
  • Work efficiency decreased by 40% and air depletion increased significantly 10 minutes post-HIRT (p < 0.01 and p = 0.02, respectively).
  • While performance showed improvement by 60 minutes post-HIRT, a notable percentage of firefighters (43%) still exhibited performance deficits exceeding minimal difference thresholds.

Conclusions:

  • An acute session of high-intensity resistance training negatively affects multiple aspects of firefighter occupational performance.
  • Performance decrements are evident 10 minutes post-HIRT, indicating a need for careful scheduling of training and duty.
  • Recovery is incomplete for a significant portion of firefighters at 60 minutes post-exercise, highlighting individual variability in fatigue response.