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Body Composition Differences in Trained and Sedentary Individuals Matched for High BMI: 308 Board #149 May 30 9

PURPOSE: We conducted a community-wide intervention to promote physical activity (PA) in Fujisawa, Kanagawa, Japan, since 2013. The intervention involves multilevel strategies, as part of which, community-dwelling elderly groups committed to exercising together were enrolled. This study aimed to assess the effects of community-based group exercises (CBGE) on increase and maintenance of PA level and dissemination of the PA message, as well as improvement of physical fitness. METHODS: This study included 148 older adults (mean age: 75.7 years, SD: 6.5 years; women: 66%) in 8 CBGE groups. The original 10-min exercise program (mean intensity: 2.7 METs, Osawa et al. 2015) was introduced to groups voluntarily exercising together at least once a week at a city center or a park in their community. Based on Japanese PA guidelines, we have recommended the individuals perform “Plus Ten (+10-min of PA per day)” and disseminate the message to surroundings. In addition, we held group discussions about maintenance and dissemination of CBGE at exchange meetings. Dissemination of “Plus Ten” message, total duration of PA (exercise and daily activities) by the questionnaire, and physical fitness tests were assessed at baseline, 6-month, and 1-year follow-up. Statistical analyses included Wilcoxon signed rank test, paired t test and chi-square test. RESULTS: We visited each group 5.6 times on average for assessment and follow-up in a year. The group exchange meeting was held 3 times. One year later, 137 (93%) continued CBGE and 11 (7%) dropped out due to health or relocation; 42 joined the group during the year. In neighborhoods, 79% of participants shared “Plus Ten” message. The median of total PA time at baseline and 1-year after was 780 and 840 minutes/week, respectively (P=0.118). Significant improvement was observed in the two-step test (1.33 to 1.39, P<0.001) and chair standing test (22.9 to 24.9 times/30 sec, P<0.001). CONCLUSIONS: CBGE had high persistence rates, maintenance of PA, and improvement of physical fitness. Dissemination of subjective the PA message from CBGE members can be effective in promoting community-level PA. Supported by the Japan Agency for Medical Research and Development (AMED), MEXT KAKENHI Grant Number JP41023054 and Keio Gijuku Academic Development Funds.