Does dispositional self-control moderate the association between stress at work and physical activity after work? A real-life study with police officers

Abstract

Background: Psychosocial stress is a major health threat in modern society. Short-term effects of stress on health behaviors have been identified as relevant processes. This article examines the moderating effect of dispositional self-control on the association between stress at work and moderate-to-vigorous physical activity (MVPA) after work. Methods: In a sample of 153 police officers (103 men, 50 women, mean age = 39.3 ± 10.4 years), daily occupational stress and hours worked were assessed via ecological momentary assessment (smartphone-based single item) in real-life. Dispositional self-control was assessed via an online questionnaire, whereas physical activity was assessed via accelerometry. A hierarchical linear regression analysis was performed to test main and interaction effects. Results: Bivariate correlations showed that perceived stress at work was positively correlated with hours worked (r = 0.24, p < 0.001, 95% CI [0.09, 0.39]), whereas a negative association was found with dispositional self-control (r = −0.27, p < 0.001, 95% CI [−0.41, −0.12]). After-work MVPA was neither associated with stress at work nor with dispositional self-control. The regression analysis yielded no significant interaction between stress at work and dispositional self-control on after-work MVPA. Conclusion: Using a state-of-the-art ecological momentary assessment approach to assess feelings of stress in real-life, stress at work did not seem to impact after-work MVPA in police officers. More research is needed to establish whether this finding is specific to police officers or whether it can be generalized to other populations.