| Summary: | Introduction: Diabetes is considered as one of the most common metabolic disorders and one of the biggest worldwide health problems; first-line treatment is suggested as a changing diet and physical activity by experts. The aim of the present study was the determination of the effectiveness of a training program based on a protective motivation theory on improving nutritional behaviors and physical activity in type 2 military diabetic patients. Methods: In this controlled intervention study, 76 military diabetic individuals (2 groups with 38 individuals in each) were participated. Data gathering instrument was a researcher-made questionnaire based on structures of conservation motivation theory. The data were entered into SPSS19 software and analyzed by using paired t-test and Pearson's correlation coefficient. Results: Findings showed that except in perceived sensitivity in the test and control groups, there was a significant difference between the mean scores of all the components of the Protective Motivation Theory. In the test group, there was a significant difference between the mean scores of all constructs of the Protective Motivation Theory before and after the educational intervention, while in the control group, there was a significant difference between the mean scores of fear, effectiveness of response, severity, and perceived sensitivity structures before and after educational intervention. Glycated hemoglobin (Hb-A1c) and weight of the intervention group were significantly decreased after the intervention. In addition, adherence to diet and physical activity were increased. Conclusion: The results of this study showed that conservation motivation theory can be used as a framework in designing educational programs to improve the diet and physical activity among diabetics.
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