Physical activity, sedentary behaviour and mental health outcomes in firefighters: A cross-sectional study

This study in firefighters aims to explore correlations between physical activity (PA), sedentary levels, PTSD symptoms, psychological distress and well-being. We also compare PTSD symptoms, psychological distress and well-being in those who meet the 150 min of moderate-to-vigorous PA per week recommendation versus those who don't. Finally, we compare PA levels in those with PTSD versus without. Self-reported PA and sedentary levels [Simple Physical Activity Questionnaire, Physical Activity Vitals Sign], PTSD symptoms (PTSD Checklist for DSM-5, PCL-5), psychological distress (Kessler-6, K-6) and well-being (WHO-5 Well-being index) were collected in 87 firefighters (77 men, age = 43.1 years; SD = 10.3). Spearman Rho correlations were used to explore associations and Mann-Whitney U tests to examine differences between subgroups. Time spent exercising correlated with PTSD symptoms (rho = -0.220; p = 0.041). Those with significant PTSD symptoms spent less time exercising (U = 102.5; p = 0.018) and more time sedentary (U = 375; p = 0.027). Physically inactive firefighters scored 5.4 points higher on the PCL-5, 1.5 points more on the K-6, and 5.2 points less on the WHO-5. Participants with PTSD (n = 6) were more sedentary (U = 375.0; p = 0.027) and exercised less (U = 102.5; p = 0.018) compared to those without. Physical inactivity and sedentary behavior could be considered in prevention and treatment programs for psychological distress and PTSD in firefighters.