The aim of this study was to quantify the physical demands of a simulated re ghting circuit and to establish the relationship between job performance and endurance and strength tness measurements. On four separate days 41 professional re ghters (39 ± 9 yr, 179.6 ± 2.3 cm, 84.4 ± 9.2 kg, BMI
26.1 ± 2.8 kg/m2) performed treadmill testing, tness testing (strength, balance and exibility) and
a simulated re ghting exercise. The re ghting exercise included ladder climbing (20 m), treadmill walking (200 m), pulling a wire rope hoist (15 times) and crawling an orientation section (50 m). Fire ghting performance during the simulated exercise was evaluated by a simple time-strain-air depletion model (TSA) taking the sum of z-transformed parameters of time to nish the exercise,
strain in terms of mean heart rate, and air depletion from the breathing apparatus. Multiple regression analysis based on the TSA-model served for the identi cation of the physiological determinants
most relevant for professional re ghting. Three main factors with great in uence on re ghting performance were identi ed (70.1% of total explained variance): VO2peak, the time re ghter exercised below their individual ventilatory threshold and mean breathing frequency. Based on the identi ed main factors in uencing re ghting performance we recommend a periodic preventive health screening for incumbents to monitor peak VO2 and individual ventilatory threshold.
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