| Abstract: | The purpose of this study was to prospectively examine the utility of the theory of planned behavior (TPB) constructs for exercise and diet behavior with women enrolled in a 4-week weight-loss program. Sixty-nine females participated in group exercise 3 times a week and they consumed a low-calorie diet for 1 month. They completed baseline measures of exercise behavior, demographic variables, and the TPB constructs for exercise and diet at the start of the program. Adherence to the exercise and diet was recorded, along with pre- and post-measurements of body composition. Significant decreases in body mass index, body fat percentage, and circumference measurements occurred from pre- to post-program. Hierarchical multiple regression analyses revealed that diet adherence was predicted by intention. However, the TPB constructs failed to predict exercise adherence, exercise intention, and diet intention. These results are discussed in relationship to previous research, and recommendations for future studies with this special population are highlighted. |
