Experiential or behavioral processes: Which one is prominent in physical activity? Examining the processes of change 1 year after an intervention of therapeutic education among adults with obesity

Objective: Although physical activity (PA) is essential, most obese people will not engage in its practice. The transtheoretical model (TTM) and its processes of change (POC) contribute to the understanding of behavior change regarding PA. The present study aimed to test how POC are associated with a progression through the stages of change (SOC) and whether they predict BMI change. Methods: Interventional study. A total of 134 subjects participated in an education program, were called at 1 year and 62 of them provided follow-up data. Participants completed the SOC and POC questionnaires at baseline, at 1 year and were classified according to their SOC progression. Results: Participants who progressed through SOC lost more weight (p < 0.001). Significant interactions were found for three out of five POC (p < 0.05). Progression through SOC was associated with an increased use of POC. Weight loss was predicted by two behavioral POC. Conclusion: Results support the previous cross-sectional studies showing that physically active people use more frequently POC. Practice implications: The present findings support the development of TTM-grounded behavioral interventions targeted to obese patients. Identifying methods to promote POC use to improve adherence to weight guidelines may lead to improved clinical outcomes and quality of life. (C) 2014 Elsevier Ireland Ltd. All rights reserved.