2015 Volume 5 Issue 2 Pages 81-90
[Objective] To investigate the effects on body composition in middle aged women using the dual energy x ray absoptiometry (DXA) by the participation of an exer cise habits acquisition program based on the behavioral science approach.[Method]The subjects, 314 sedentary but healthy women with no regular exercise habits, were assigned to an intervention group (n=280; 48.5±11.0 years) or a control group (n=34; 49.8±13.9 years). The intervention group participated in the exercise program which was for 2hoursa week over 12 weeks, and kept a daily record of the amount of accumulated stepsandtime spent on aerobic exercise. [Result] According to the twoway ANOVA and subsequent analysis showed that a significant interaction (group x time) were observed in total fat mass. In the intervention group, total fat mass was decreased significantly (p<.001) from baseline. The total amount of bone mineral content and lean tissue mass were unchanged in both groups. In the intervention group, the amount of decrease in total fat mass (1,776 ±1,737 g) was equivalent to the reduction of total body mass (1,781±1,910 g). Reduction of trunk fat mass (1,094±1,128 g) was the greatest among all four regions (head, arms, legs,trunk). [Conclusion] These results suggest that this program based on the behavioral sci ence approach was effective for selectively reducing body fat mass, especially trunk fat,while maintaining bone mineral content and lean tissue mass, in middle-aged women.