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The effect of experimentally induced sedentariness on mood and psychobiological responses to mental stress.
journal contribution
posted on 2015-10-22, 08:25 authored by Romano Endrighi, Andrew Steptoe, Mark HamerBackground
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.
History
School
- Sport, Exercise and Health Sciences
Published in
British Journal of PsychiatryCitation
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).Publisher
© Royal College of PsychiatristsVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/Publication date
2015Notes
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/ISSN
0007-1250Publisher version
Language
- en