Insufficient free-time physical activity and occupational factors in Brazilian public school teachers

OBJECTIVE: To evaluate if perceived occupational factors are associated with insufficient free-time physical activity in Brazilian public school teachers. METHODS: The relationship between insufficient physical activity (< 150 minutes/week) and variables related to work was analyzed in 978 elementary and high school teachers calculating the prevalence ratio (PR) and 95% confidence interval (95% CI) in Poisson regression models, adjusted for sociodemographic and health variables. RESULTS: The prevalence of insufficient physical activity was 71.9%, and this condition was associated independently with the perception of bad or regular balance between personal and professional life (PR = 1.09; 95% CI 1.01-1.18), perception that standing time affects the work (PR = 1.16; 95% CI 1.01-1.34), low or very low perception of current ability for the physical requirements of work (PR = 1.21; 95% CI 1.08-1.35), and temporary employment contract (PR = 1.13; 95% CI 1.03-1.25). The teaching of physical education was associated with lower prevalence of insufficient physical activity (PR = 0.78; 95% CI 0.64-0.95). CONCLUSIONS: The perception of adverse working conditions is associated with increased prevalence of insufficient physical activity in teachers and should be considered for the promotion of physical activity in this population.