Objectives: This study aimed to investigate the impact of a 6-month health intervention on truck drivers' cardiovascular reactivity to stress and whether cardiovascular reactivity was predictive of depression, anxiety, or fatigue symptoms at 6-month follow-up.
Methods: Two hundred thirty-eight truck drivers completed a 6-month cluster randomized controlled trial to increase physical activity and completed a stress protocol (Stroop and mirror-tracing tasks) with measurements of heart rate, systolic blood pressure, and diastolic blood pressure taken, alongside fatigue, anxiety, and depressive symptoms assessment. Measures were taken at 0 and 6 months.
Results: Analyses showed a negative relationship between 0-month diastolic blood pressure reactivity and 6-month persistent fatigue. Trends toward negative relationships between systolic blood pressure reactivity and future anxiety and fatigue symptoms at 6 months were evident.
Conclusions: Our findings may have serious implications, as fatigue can be a major cause of road traffic collisions in truck drivers.
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