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Title: Physical activity, sedentary index, and mental disorders in the sun cohort study
Authors: Sanchez-Villegas, Almudena 
Ara, Ignacio
Guillén-Grima, Francisco
Bes-Rastrollo, Maira
Varo-Cenarruzabeitia, Jose Javier
Martinez-González, Miguel A.
UNESCO Clasification: 32 Ciencias médicas
3206 Ciencias de la nutrición
3211 Psiquiatría
Keywords: Leisure-Time
Depressive Symptoms
Exercise, et al
Issue Date: 2008
Project: Papel de la Ingestión de Ácidos Grasos Omega-3 y de la Actividad Física en la Prevención de la Depresión 
Journal: Medicine and Science in Sports and Exercise 
Abstract: Purpose: There is evidence to suggest a beneficial effect of physical activity on several mental disorders. Methods: The study aim was to assess the association between low physical activity during leisure time (or sedentary lifestyles) and the incidence of mental disorders in 10,381 participants, from a Spanish dynamic prospective cohort of university graduates followed up for 6 yr (the SUN study). The baseline assessment included a validated questionnaire on physical activity during leisure-time and sedentary activities. A subject was classified as an incident case of mental disorder if he or she reported a physician diagnosis of depression, anxiety or stress, and/or the use of antidepressant medication or tranquilizers in at least one of the follow-up questionnaires. Results: The odds ratios (OR) and 95% confidence intervals (CI) of a mental disorder for successive levels of leisure-time physical activity were 1 (reference), 1.00 (0.81, 1.23), 0.99 (0.81, 1.21), 0.72 (0.58, 0.89), and 0.81 (0.65, 1.00) (P for trend: < 0.01). The OR for subjects who spent more than 42 h.wk (-) (1) watching television and/or using the computer was 1.31 (95% CI = 1.01, 1.68) as compared with those spending less than 10.5 h.wk (- 1). Conclusion: Our findings suggest a joint association of leisure-time physical activity and sedentary behavior on the incidence of mental disorders.
ISSN: 0195-9131
DOI: 10.1249/MSS.0b013e31816348b9
Source: Medicine and Science in Sports and Exercise[ISSN 0195-9131],v. 40, p. 827-834
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