Acute Physiological Response of Live-Fire Simulation Activities Affecting Cardiovascular Health in Live-Fire Instructors: A Randomized Controlled Simulation Study.

Objectives: This study aimed to assess acute physiological response of fire suppression simulation affecting cardiovascular health during repeated bouts of simulation.

Methods: Fifteen live-fire instructors were randomly divided into three groups according to fire suppression simulation frequency. Vital signs, biomarkers, and heart rate variability (HRV) were measured before and after simulation.