Male police officers from a city police station in Tasmania (n = 20) and a matched group of clerical workers (n = 20) monitored their heart rate, blood pressure and self-reported levels of stress and arousal over a two-week period. Measurements on workdays during which stressful events occurred were compared to non-event workdays and non-workdays. Two group differences were demonstrated, with the clerical workers reporting higher levels of stress, and the police officers reporting higher levels of arousal. Support was evident for the distinction between workdays and non-workdays, and support was demonstrated for differences between different types of workdays. Evidence suggested that restricting the time frame of such research may lead to results that are inaccurate or inconsistent because workdays differ in content.