日本の地域在住高齢者における Net-step exercise と抑うつ状態

Introduction: Leisure-time physical activity (LTPA) and exercise have attracted attention as potential preventive factors against depression in the elderly. The net-step exercise (NSE) was developed in Hokkaido, Japan to assist elderly people with decreased physical functions. NSE is a non-aerobic, low-intensity, and slow balance motion LTPA. In the present study, the relationship between NSE and depressive symptoms among the community-dwelling elderly is examined. Methods: This study employed a cross-sectional design with community-dwelling elderly participants, aged 72?81 years (n = 672; mean age = 76.4 years). Participation in NSE and other LTPA, including walking, jogging, and park golf, a sport popular in Hokkaido, particularly among the elderly, was assessed. Depressive symptoms were measured using the 15-item Geriatric Depression Scale (GDS-15). Results: Univariate analysis showed that those participating in NSE more than once a month and those who reported engaging in walking or park golf more than once a week were less likely to report symptoms of depression. Multivariate analysis showed that NSE and walking had marginally significant (odds ratio (OR) = 0.53; 95% CI: 0.27?1.02) and significant (OR = 0.61; 95% CI: 0.40?0.93) inverse associations, respectively, with reports of depressive symptoms even after adjustments for age, sex, years of education, continuous walking for 15 min, experience of a fall in the past year, utilization of various long-term care services provided for the elderly, stroke, frequency of jogging, and park golf. Discussion: This study showed that participants engaging in NSE, which is a non-aerobic, low-intensity, and low frequency activity, had a marginally significantly inverse association with depressive symptoms. Longitudinal research should be conducted in the future