Key result
High cardiorespiratory fitness in firefighters is linked to faster HRR after submaximal and maximal exercise.
Why the study?
Autonomic nervous system failure to recover after strenuous events may cause sudden cardiac death in firefighters, prompting investigation into whether cardiorespiratory fitness influences heart rate recovery kinetics.
Does high cardiorespiratory fitness improve heart rate recovery kinetics after exercise in active-duty firefighters?
Comparison
High CRF (VO2 peak ≥42 ml·kg−1·minute−1) vs Low CRF (<42 ml·kg−1·minute−1)
Design
Cross-sectional physiological study
Authors
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May support fitness programs targeting autonomic recovery in firefighters; hypothesis-generating and requires prospective confirmation.
Cross-Sectional (n=37)
Does high cardiorespiratory fitness improve heart rate recovery kinetics after exercise in active-duty firefighters?
p-value: p=0.003
Greater cardiorespiratory fitness is associated with enhanced heart rate recovery kinetics after exertion in firefighters, suggesting improved autonomic nervous system recovery.
Cornell et al. (2023) conducted a cross-sectional in Active-duty firefighters (n=37). High cardiorespiratory fitness (V̇O2 peak ≥42 ml·kg−1·minute−1) vs. Low cardiorespiratory fitness (V̇O2 peak <42 ml·kg−1·minute−1) was evaluated on Heart rate recovery (HRR) kinetics after submaximal and maximal exercise (p=0.003). High cardiorespiratory fitness in firefighters was associated with significantly faster heart rate recovery decay rates after both submaximal (p=0.003) and maximal exercise (p=0.043).
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