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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19091

Title: The effect of experimentally induced sedentariness on mood and psychobiological responses to mental stress.
Authors: Endrighi, Romano
Steptoe, Andrew
Hamer, Mark
Issue Date: 2015
Publisher: © Royal College of Psychiatrists
Citation: ENDRIGHI, R., STEPTOE, A. and HAMER, M., 2015. The effect of experimentally induced sedentariness on mood and psychobiological responses to mental stress. British Journal of Psychiatry, 207(4).
Abstract: Background Evidence suggests a link between sedentary behaviours and depressive symptoms. Mechanisms underlying this relationship are not understood, but inflammatory processes may be involved. Autonomic and inflammatory responses to stress may be heightened in sedentary individuals contributing to risk, but no study has experimentally investigated this. Aim To examine the effect of sedentary time on mood and stress responses using an experimental design. Method Forty-three individuals were assigned to a free-living sedentary condition and to a control condition (usual activity) in a cross-over, randomised fashion and were tested in a psychophysiology laboratory after spending 2 weeks in each condition. Participants completed mood questionnaires (General Health Questionnaire and Profile of Mood States) and wore a motion sensor for 4 weeks. Results Sedentary time increased by an average of 32 min/day (P = 0.01) during the experimental condition compared with control. Being sedentary resulted in increases in negative mood independent of changes in moderate to vigorous physical activity (ΔGHQ = 6.23, ΔPOMS = 2.80). Mood disturbances were associated with greater stress-induced inflammatory interleukin-6 (IL-6) responses (β = 0.37). Conclusion Two weeks of exposure to greater free-living sedentary time resulted in mood disturbances independent of reduction in physical activity. Stress-induced IL-6 responses were associated with changes in mood.
Description: This is an Open Access Article. It is published by The Royal College of Psychiatrists under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Version: Published
DOI: 10.1192/bjp.bp.114.150755
URI: https://dspace.lboro.ac.uk/2134/19091
Publisher Link: http://dx.doi.org/10.1192/bjp.bp.114.150755
ISSN: 0007-1250
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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