Abstract
With the current study, we investigate mechanisms linking sleep quality with work engagement. Work engagement is an affective-motivational state of feeling vigorous, absorbed, and dedicated while working. Drawing from both the effort-recovery model and the job demands-resources framework, we hypothesize that sleep quality should be positively related to work engagement via the replenishment of personal resources that become apparent in mental health and physical health. Because personal resources should gain salience especially in the face of job demands, we hypothesize that overtime as an indicator for job demands should strengthen the positive relationship between mental health and work engagement. We gathered data from 152 employees from diverse industries via an online survey. Results showed that sleep quality was positively related to work engagement (r = 0.20, p < 0.05), and that mental health mediated this relationship (indirect effect: β = 0.23, lower limit confidence interval = 0.13, upper limit confidence interval = 0.34). However, physical health did not serve as a mediator. Overtime turned out to be significantly and positively related to work engagement (r = 0.22, p < 0.01), replicating previous findings, but did not significantly interact with mental health or physical health in predicting work engagement. Overall, the study highlights the significance of sleep quality for employees' mental health and work engagement.
Highlights
The research on sleep and its relationship to factors in the context of work has gained growing attention over the past years
A possible explanation for why mental health turned out to serve as a personal resource in this context, while physical health did not, is that we investigated our model in a sample of white-collar workers
This study revealed that promoting sleep quality is one of the basic preconditions for a healthy mind
Summary
The research on sleep and its relationship to factors in the context of work has gained growing attention over the past years. In order to draw implications for practice and to highlight sleep’s significance for employees’ health and performance, it is important to gain an even better understanding of the ways in which sleep can influence employees’ behavior. It aims to contribute to sleep research by shedding light on possible mechanisms, namely mental health and physical health, between sleep quality and well-being at work, represented through work engagement. We would like to broaden the perspective on the Job Demands-Resources (JD-R) model [6, 7] and examine mental and physical health as personal, non-work resources in our conceptual model that link the non-work domain, represented through sleep, and the work domain, represented by work engagement.
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