Effects of Time-Efficient Occupational Exercise on Cardiorespiratory Fitness in Firefighters

Abstract

Objective For a cohort of operational firefighters, we assessed the effects of workplace based high intensity interval training (HIIT) on cardiorespiratory fitness. Methods Fifteen firefighters performed HIIT or moderate intensity continuous training (MICT) over 4-weeks. Outcomes were peak oxygen uptake (V̇O2peak), time trial performance, and affective (pleasure/displeasure) responses to exercise. Results There was an increase in V̇O2peak for both conditions although this did not reach statistical significance (P = 0.06, η 2 = 0.26) and time trial performance improved for both groups (2%, P < 0.01, η 2 = 0.51). Affective responses were more favourable for HIIT, but both conditions avoided excessive sensations of displeasure. Conclusion Results suggest workplace based HIIT improved fitness and performance to a similar magnitude as MICT whilst avoiding overly negative affective responses and could improve occupational health of firefighters, despite reduced time commitment.