PURPOSE: To assess whether forming general behavioral intentions and implementing intentions through action plans promotes weight loss and is moderated by weight loss goals and self-efficacy. DESIGN: A quasi-experimental study comparing change in body mass index (BMI) for 15 months between a behavioral intentions condition (BIC), an implementation intentions condition (IIC), and a comparison condition (CC). SETTING: Ten-week weight loss program delivered in weekly group meetings at community medical centers. SUBJECTS:Six hundred thirty-two attendants at the weight loss program (80% of program attendants participated in the study). INTERVENTION: Weight loss program focused on lifestyle changes, augmented by two experimental conditions (vs. a comparison condition): BIC, intended use of weight loss techniques; IIC, intended use and detailed plans for two techniques. Phone follow-up was conducted 3 and 12 months later. MAIN OUTCOME: BMI during the program (computed on the basis of weight and height measured on a mechanical medical scale). Experimental manipulations included exposure to list of techniques (BIC/IIC) and structured planning form (IIC); independent variables were assessed with questionnaires (eating self-efficacy, weight loss goal, demographics). ANALYSIS: Linear mixed models estimating changes in BMI and their interactions with the planning interventions, goals, and self-efficacy. RESULTS: Participants in the BIC and IIC lost 40% more weight during the 10-week program than those in the CC (1.10 and 1.11 BMI points compared with .79; ts < -2.76, ps < .01). Weight loss goals interacted with implementation intentions (t = 2.98, p < .01). Self-efficacy was unrelated to weight loss. No differences were found between conditions at 3 and 12 months after the program. CONCLUSION: Findings revealed that forming implementation intentions promotes weight loss within a weekly program at a field setting and that its effectiveness depends on initial high goals.
RCT Entities:
PURPOSE: To assess whether forming general behavioral intentions and implementing intentions through action plans promotes weight loss and is moderated by weight loss goals and self-efficacy. DESIGN: A quasi-experimental study comparing change in body mass index (BMI) for 15 months between a behavioral intentions condition (BIC), an implementation intentions condition (IIC), and a comparison condition (CC). SETTING: Ten-week weight loss program delivered in weekly group meetings at community medical centers. SUBJECTS: Six hundred thirty-two attendants at the weight loss program (80% of program attendants participated in the study). INTERVENTION: Weight loss program focused on lifestyle changes, augmented by two experimental conditions (vs. a comparison condition): BIC, intended use of weight loss techniques; IIC, intended use and detailed plans for two techniques. Phone follow-up was conducted 3 and 12 months later. MAIN OUTCOME: BMI during the program (computed on the basis of weight and height measured on a mechanical medical scale). Experimental manipulations included exposure to list of techniques (BIC/IIC) and structured planning form (IIC); independent variables were assessed with questionnaires (eating self-efficacy, weight loss goal, demographics). ANALYSIS: Linear mixed models estimating changes in BMI and their interactions with the planning interventions, goals, and self-efficacy. RESULTS:Participants in the BIC and IIC lost 40% more weight during the 10-week program than those in the CC (1.10 and 1.11 BMI points compared with .79; ts < -2.76, ps < .01). Weight loss goals interacted with implementation intentions (t = 2.98, p < .01). Self-efficacy was unrelated to weight loss. No differences were found between conditions at 3 and 12 months after the program. CONCLUSION: Findings revealed that forming implementation intentions promotes weight loss within a weekly program at a field setting and that its effectiveness depends on initial high goals.
Authors: Karen E Schifferdecker; Anna M Adachi-Mejia; Rebecca L Butcher; Sharon O'Connor; Zhigang Li; Dorothy A Bazos Journal: Health Promot Pract Date: 2015-08-27
Authors: Lucía Solier-López; Raquel González-González; Alfonso Caracuel; Naomi Kakoschke; Natalia Lawrence; Raquel Vilar-López Journal: Int J Environ Res Public Health Date: 2022-07-11 Impact factor: 4.614
Authors: Jacqueline F Hayes; Katherine N Balantekin; Andrea K Graham; Michael J Strube; Warren K Bickel; Denise E Wilfley Journal: Transl Behav Med Date: 2021-03-16 Impact factor: 3.046
Authors: Jacqueline F Hayes; Katherine N Balantekin; Ellen E Fitzsimmons-Craft; Joshua J Jackson; Danielle R Ridolfi; Holley S Boeger; R Robinson Welch; Denise E Wilfley Journal: Ann Behav Med Date: 2021-02-12