Psychological predictors of successful weight loss

Abstract

As obesity prevalence rises in Western societies, so do the number of people engaging in weight losing strategies. Unfortunately, only a small percentage of dieting individuals actually achieve their target weight. Therefore, the goal of the present study was to investigate whether psychological factors like depression and dieting motivation predict successful weight loss. 43 overweight/obese participants engaged in a 16-week online coaching program to stimulate weight loss. Questionnaires were administered at several time-points throughout and after the program, complete data were available from 35 participants. Results of backward regression analyses indicated that several predictors measured at the start of the program were predictive of BMI change 16–20 weeks later. That is, higher dieting motivation predicted weight loss, while more concerns about eating, weight and shape predicted weight gain. Contrary to expectation, higher scores on disinhibition, including emotional and external eating, were significantly predictive of weight loss. Results of this study indicate that psychological characteristics might have a significant influence on whether a dieting attempt will be successful. Further research is needed to investigate these and other psychological predictors of weight loss and how these factors can be optimally intervened on, so that the effectiveness of current weight loss programs can be improved.