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Palmeira, António L.; Sánchez‐Oliva, David; Encantado, Jorge; Marques, Marta M.; Santos, Inês; Duarte, Cristiana; Matos, Marcela; Larsen, Sofus C.; Horgan, Graham; Teixeira, Pedro J.; Heitmann, Berit L.; Stubbs, R. James
British journal of health psychology, 20/May , Volume: 28, Issue: 2Journal Article
Objective Weight regain prevention is a critical public health challenge. Digital behaviour change interventions provide a scalable platform for applying and testing behaviour change theories in this challenging context. This study's goal was to analyse reciprocal effects between psychosocial variables (i.e., needs satisfaction, eating regulation, self‐efficacy) and weight over 12 months using data from a large sample of participants engaged in a weight regain prevention trial. Methods The NoHoW study is a three‐centre, large‐scale weight regain prevention trial. Adults who lost >5% of their weight in the past year (N = 1627, 68.7% female, 44.10 ± 11.86 years, 84.47 ± 17.03 kg) participated in a 12‐month' digital behaviour change‐based intervention. Weight and validated measures of basic psychological needs satisfaction, eating regulation and self‐efficacy were collected at baseline, six‐ and 12 months. Correlational, latent growth models and cross‐lagged analysis were used to identify potential reciprocal effects. Results Baseline higher scores of needs satisfaction and self‐efficacy were associated with six‐ and 12‐month' weight loss. Baseline weight was linked to all psychosocial variables at six months, and six‐months weight was associated with needs satisfaction and self‐efficacy at 12 months. During the 12 months, increases in eating regulation, needs satisfaction and self‐efficacy were associated with weight loss over the same period, and reciprocal effects were observed between the variables, suggesting the existence of Weight Management Cycles. Conclusions While further studies are needed, during long‐term weight regain prevention, weight decrease, needs satisfaction and self‐efficacy may lead to Weight Management Cycles, which, if recurrent, may provide sustained prevention of weight regain.
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