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Sleep Health Mediates the Relationship Between Physical Activity and Depression Symptoms

Overview
Journal Sleep Breath
Publisher Springer
Date 2021 Sep 25
PMID 34561758
Citations 9
Authors
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Abstract

Purpose: This study aimed to investigate cross-sectional associations between physical activity, sleep health, and depression symptoms using mediation models.

Methods: Participants (N = 1576, M = 39.3 years, 40% female) were recruited online from Amazon's Mechanical Turk crowd-sourcing service. Physical activity was measured using a single-item self-report measure and depression symptoms were reported using the Hospital Anxiety and Depression Scale. Sleep health was measured using the 6-question RUSATED Sleep Health survey V2.0.

Results: Good sleep health (direct effect: β =  - .273, t =  - 13.87, p < .0001) and high levels of physical activity (direct effect: β =  - .092, t =  - 4.73, p < .0001) were both individually associated with fewer depression symptoms. Sleep health significantly mediated 19% of the association between physical activity and depression symptoms (indirect effect: β =  - .022, 95% CI [- .036 to - .008]), while physical activity significantly mediated 3% of the relationship between sleep health and depression symptoms (indirect effect: β =  - .008, 95% CI [- .014 to - .003]).

Conclusion: Physical activity and sleep health act as predictors and mediators of depression symptoms.

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