School of Psychology, University of Ottawa, Ottawa, Ontario, Canada.
Psychol Health Med. 2009 Aug;14(4):419-29. doi: 10.1080/13548500903111806.
This study was set out to test if autonomous motivation mediated the relationship between self-efficacy and 12-month physical activity (PA) in adults with type 2 diabetes involved in a randomized exercise trial. Participants (n = 234) completed questionnaires measuring barrier self-efficacy at 3 months, autonomous motivation at 6 months, and PA at 12 months. A mediational analysis of longitudinal data revealed that autonomous motivation mediated the relationship between barrier-self-efficacy and PA. High barrier self-efficacy can therefore help predict 12-month PA in adults with type 2 diabetes, although this effect is attenuated by autonomous motivation. Hence, participating in PA for autonomous reasons such as by choice and/or for fun further explains PA at 12 months in this population. Results of this study extend our understanding of the motivational constructs involved in PA in the maintenance phase. This study has important theoretical implications in that it helps to organize and consolidate well-known correlates of PA by proposing a temporal relationship between them that could be tailored in interventions.
本研究旨在测试自主动机是否在 2 型糖尿病患者的随机运动试验中调节了自我效能感与 12 个月身体活动（PA）之间的关系。参与者（n=234）在 3 个月时完成了测量障碍自我效能感的问卷，在 6 个月时完成了自主动机问卷，在 12 个月时完成了 PA 问卷。对纵向数据的中介分析表明，自主动机调节了障碍自我效能感和 PA 之间的关系。因此，高障碍自我效能感可以帮助预测 2 型糖尿病患者的 12 个月 PA，尽管这种效果被自主动机减弱了。因此，出于自主原因（如选择和/或为了乐趣）参与 PA 可以进一步解释该人群在 12 个月时的 PA。本研究的结果扩展了我们对维持阶段 PA 中涉及的动机结构的理解。这项研究具有重要的理论意义，因为它有助于通过提出它们之间的时间关系来组织和整合 PA 的已知相关性，这些关系可以在干预中进行定制。
