Kwasnicka Dominika, Dombrowski Stephan U, White Martin, Sniehotta Falko F
a Faculty of Health Sciences , School of Psychology and Speech Pathology, Curtin University , Perth , Australia.
b School of Human Health and Social Sciences, Central Queensland University , Perth , Australia.
Psychol Health. 2017 Jun;32(6):686-708. doi: 10.1080/08870446.2017.1293057. Epub 2017 Mar 21.
Behaviour change interventions are effective in supporting individuals to achieve clinically significant weight loss, but weight loss maintenance (WLM) is less often attained. This study examined predictive variables associated with WLM.
N-of-1 study with daily ecological momentary assessment combined with objective measurement of weight and physical activity, collected with wireless devices (Fitbit™) for six months. Eight previously obese adults who had lost over 5% of their body weight in the past year took part. Data were analysed using time series methods.
Predictor variables were based on five theoretical themes: maintenance motives, self-regulation, personal resources, habits, and environmental influences. Dependent variables were: objectively estimated step count and weight, and self-reported WLM plan adherence.
For all participants, daily fluctuations in self-reported adherence to their WLM plan were significantly associated with most of the explanatory variables, including maintenance motivation and satisfaction with outcomes, self-regulation, habit, and stable environment. Personal resources were not a consistent predictor of plan adherence.
This is the first study to assess theoretical predictions of WLM within individuals. WLM is a dynamic process including the interplay of motivation, self-regulation, habit, resources, and perceptions of environmental context. Individuals maintaining their weight have unique psychological profiles which could be accounted for in interventions.
行为改变干预措施在支持个体实现具有临床意义的体重减轻方面是有效的，但体重减轻维持（WLM）的情况则较少见。本研究调查了与体重减轻维持相关的预测变量。
1例患者的研究，采用每日生态瞬时评估，并结合使用无线设备（Fitbit™）客观测量体重和身体活动，为期6个月。8名曾在过去一年中体重减轻超过5%的肥胖成年人参与了研究。采用时间序列方法对数据进行分析。
预测变量基于五个理论主题：维持动机、自我调节、个人资源、习惯和环境影响。因变量为：客观估计的步数和体重，以及自我报告的体重减轻维持计划依从性。
对于所有参与者，自我报告的体重减轻维持计划依从性的每日波动与大多数解释变量显著相关，包括维持动机和对结果的满意度、自我调节、习惯和稳定的环境。个人资源并非计划依从性的一致预测因素。
这是第一项评估个体体重减轻维持理论预测的研究。体重减轻维持是一个动态过程，包括动机、自我调节、习惯、资源和对环境背景的认知之间的相互作用。维持体重的个体具有独特的心理特征，可在干预措施中加以考虑。
