Age Differences in Health Behavior and Weight Changes in Japanese Workers: 1-Year Follow-Up Study

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Objective:To examine 1-year changes in stage of health behavior change and its associations with changes in health behavior and weight in a working population cohort.Methods:Using annual health examination data, 57,431 eligible Japanese workers aged 18 to 64 years were examined for their 1-year changes in stage of change, eating and exercise habits, and weight.Results:The stages of change became polarized into the precontemplation and the action/maintenance (ie, post-action) and became stabilized with increasing age. The 1-year change in stage of change was accompanied by changes in eating and exercise habits and weight.Conclusions:The age-dependent tendency towards bipolarization and stabilization of stages of change suggested that workplace health promotion interventions for facilitating health behavior changes should be started at younger ages.

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