Changes In Self Efficacy Physical Activity And Adherence In Overweight Or Obese Women Participating In A Life Style Intervention A Randomized Controlled Trial

Author : Ya-Ting Hsu
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (755 download)

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Download or read book The Effects of a Self-determination Theory Based Exercise Intervention on Physical Activity and Psychological Variables in Sedentary Overweight Or Obese Women written by Ya-Ting Hsu and published by . This book was released on 2011 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: There is epidemiological evidence for a strong association between obesity and insufficient leisure-time physical activity and low levels of occupational activity in industrialized societies. Women are more likely to be physically inactive and overweight, and thus, we need an effective approach using behavioral theories to help sedentary overweight/obese women adopt and maintain regular exercise. Project CHANGE (to being a Confident, Healthy, And Goal--directed Exerciser) is an 8-week intervention with 4-week follow-up that targeted constructs from Self-Determination Theory (SDT) and addressed both behavioral strategies and physical skills. A total of 25 eligible participants were enrolled in Project CHANGE and were randomized to two treatment conditions: Self-Determination Theory-based exercise training plus behavioral intervention (SD group) or standard care (SC group) with traditional supervised exercise training. The final sample size was 21 (NSD = 11; NSC = 10). There were 2 dropouts from each group. Participants completed fitness assessments and questionnaires to measure physical activity, quality of life, depressive symptoms, SDT constructs, and other established psychological mediators of exercise, such as self-efficacy and goal setting. The results showed that the weekly energy expenditure did not differ significantly between the groups at post-intervention when baseline PA was controlled. However, the majority of the participants in the SD group remained active at the 4-week follow-up assessment and met the public health PA recommendation. The treatment effects on the psychological variables were limited when controlling for baseline values. For both groups, integrated regulation, perceived autonomy support, and exercise goal-setting significantly increased over time. Exercise planning had a tendency to increase, but not significantly. Scheduling self-efficacy was significantly higher in the SD group than the SC group, regardless of time. In the follow-up analysis, we categorized all the participants into two groups based upon exercise adherence, defined as exercising>= 150 min/week at the 4-week follow-up (i.e., adherent group and non-adherent group). Participants in the adherent group had significantly greater autonomous motivation (i.e., intrinsic motivation, integrated regulation, and identified regulation), scheduling and coping self-efficacies, and self-regulatory techniques (i.e., goal-setting and planning) compared to the non-adherent group. Confidence and ability to self-regulate were important for exercise adherence. Goal-setting was the most influential predictor among these variables. The results show promise and warrant additional testing of Project CHANGE as a method to help overweight or obese women start and further maintain exercise behavior. A higher fidelity SDT intervention with larger sample size is necessary to examine the treatment effect and the proposed SDT causal pathways.