Bidirectional association between physical activity and symptoms of anxiety and depression: the Whitehall II study
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Although it has been hypothesized that the association of physical activity with depressive and anxiety symptoms is bidirectional, few studies have examined this issue in a prospective setting. We studied this bidirectional association using data on physical activity and symptoms of anxiety and depression at three points in time over 8 years. A total of 9,309 participants of the British Whitehall II prospective cohort study provided data on physical activity, anxiety and depression symptoms and 10 covariates at baseline in 1985. We analysed the associations of physical activity with anxiety and/or depression symptoms using multinomial logistic regression (with anxiety and depression symptoms as dependent variables) and binary logistic regression (with physical activity as the dependent variable). There was a cross-sectional inverse association between physical activity and anxiety and/or depressive symptoms at baseline (ORs between 0.63 and 0.72). In cumulative analyses, regular physical activity across all three data waves, but not irregular physical activity, was associated with reduced likelihood of depressive symptoms at follow-up (OR = 0.71, 95 % CI 0.54, 0.99). In a converse analysis, participants with anxiety and depression symptoms at baseline had higher odds of not meeting the recommended levels of physical activity at follow-up (OR = 1.79, 95 % CI 1.17, 2.74). This was also the case in individuals with anxiety and/or depression symptoms at both baseline and follow-up (OR = 1.70, 95 % CI 1.10, 2.63). The association between physical activity and symptoms of anxiety and/or depression appears to be bidirectional.
KeywordsCommon mental disorders Physical activity Bidirectional association Longitudinal studies
Body mass index
General Health Questionnaire
We thank all participating civil service departments and their welfare personnel, and establishment officers; the Occupational Health and Safety Agency; the Council of Civil Service Unions; all participating civil servants in the Whitehall II study; all members of the Whitehall II study team. The Whitehall II study team comprises research scientists, statisticians, study coordinators, nurses, data managers, administrative assistants and data entry staff, who make the study possible. The Whitehall II study is supported by grants from the Medical Research Council; British Heart Foundation; National Heart Lung and Blood Institute (R01HL036310), US, NIH and the National Institute on Aging (R01AG013196 and R01AG034454), US, NIH. MJS is supported by a grant from the British Heart Foundation. MK is supported by the BUPA Foundation, UK, the Academy of Finland and the EU New OSH ERA Research Programme. AS-M is supported by a “European Young Investigator Award” from the European Science Foundation and the National Institute on Aging, NIH (R01AG013196, R01AG034454).
Conflict of interest
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