Change in physical activity and weight in relation to retirement: the French GAZEL Cohort Study.

Abstract : To examine the trajectories of physical activity from preretirement to postretirement and to further clarify whether the changes in physical activity are associated with changes in body weight. Prospective. French national gas and electricity company (GAZEL cohort). From the original sample of 20 625 employees, only those retiring between 2001 and 2008 on a statutory basis were selected for the analyses (analysis 1: n=2711, 63% men; analysis 2: n=3812, 75% men). Persons with data on at least one preretirement and postretirement measurement of the outcome were selected. All outcome data were gathered by questionnaires. In analysis 1, the annual prevalence of higher physical activity (walking ≥5 km/week) 4 years before and after retirement was analysed. In analysis 2, changes in leisure-time sport activities (engagement, frequency and manner) from preretirement to postretirement were analysed with simultaneous changes in body weight (kilogram). In analysis 1 (n=2711), prevalence estimates for 4 years before and 4 years after retirement showed that higher leisure-time physical activity (walking at least 5 km/week) increased by 36% in men and 61% in women during the transition to retirement. This increase was also observed among people at a higher risk of physical inactivity, such as smokers and those with elevated depressive symptoms. In a separate sample (analysis 2, n=3812), change in weight as a function of preretirement and postretirement physical activity was analysed. Weight gain preretirement to postretirement was 0.85 (95% CI 0.48 to 1.21) to 1.35 (0.79 to 1.90) kg greater among physically inactive persons (decrease in activity or inactive) compared with those physically active (p<0.001). Retirement transition may be associated with beneficial changes in lifestyle and may thus be a good starting point to preventive interventions in various groups of individuals in order to maintain long-term changes.
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BMJ, BMJ Publishing Group, 2011, 2, pp.e000522. 〈10.1136/bmjopen-2011-000522〉
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Noora Sjösten, Mika Kivimäki, Archana Singh-Manoux, Jane E Ferrie, Marcel Goldberg, et al.. Change in physical activity and weight in relation to retirement: the French GAZEL Cohort Study.. BMJ, BMJ Publishing Group, 2011, 2, pp.e000522. 〈10.1136/bmjopen-2011-000522〉. 〈inserm-01157622〉

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