Exploration of Heart Rate Recovery After Maximal Treadmill and Three-Minute All-Out Shuttle Tests in Firefighters

Exploration of Heart Rate Recovery After Maximal Treadmill and Three-Minute All-Out Shuttle Tests in Firefighters

The purpose of this study was to compare heart rate recovery (HRR) after a maximal treadmill (MAX-TM) and three-minute all-out (3MT) test between firefighters (FF) and a control (CON) group. Nine male CON and nine male FF participants completed height (m), weight (kg), body fat percent (BF%), normal...

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Bibliographic Details
Main Authors: Benjamin J. Mendelson, Kyle T. Ebersole, Scott D. Brau, Nathan T. Ebersole
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Fire
Subjects:
heart rate recovery
work capacity
firefighter
critical velocity
Online Access:https://www.mdpi.com/2571-6255/8/1/20
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Summary:The purpose of this study was to compare heart rate recovery (HRR) after a maximal treadmill (MAX-TM) and three-minute all-out (3MT) test between firefighters (FF) and a control (CON) group. Nine male CON and nine male FF participants completed height (m), weight (kg), body fat percent (BF%), normalized handgrip (GRIP<sub>NORM</sub>, kg/kg), and MAX-TM with direct gas analysis to capture aerobic capacity (VO<sub>2PEAK</sub>, mL/kg/min). A shuttle-sprint 3MT was used to measure critical velocity (CV, m/s) and <i>D</i>′ (m). Non-linear models determined HR decay (<i>HRR<sub>τ</sub></i>), HR asymptote (<i>HR<sub>∞</sub></i>), and HR amplitude (<i>HR<sub>amp</sub></i>). Two-way GROUP (FF vs. CON) by TEST (MAX-TM vs. 3MT) repeated measures ANOVAs indicated a significant TEST (<i>F</i> = 7.004, <i>p</i> = 0.018) effect on <i>HR<sub>amp</sub></i>. When divided by VO<sub>2PEAK</sub> classification (FITNESS), a significant TEST effect was observed (<i>F</i> = 7.661, <i>p</i> = 0.014) on <i>HR<sub>amp</sub></i>. VO<sub>2PEAK</sub> was significantly related to CV (<i>r</i> = 0.583, <i>p</i> = 0.011), GRIP<sub>NORM</sub> (<i>r</i> = 0.668, <i>p</i> = 0.002), and BF% (<i>r</i> = −0.890, <i>p</i> < 0.001). Complete autonomic nervous system recovery may depend on the intensity of task demands and cardiorespiratory fitness.
ISSN:2571-6255

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