Department of Social and Preventive Medicine, Laval University, Quebec City, Canada.
Psychol Health. 2013;28(2):217-33. doi: 10.1080/08870446.2012.723711. Epub 2012 Sep 24.
Physical activity is a key factor for healthy ageing and obesity management. The aim of this study was to test the effect of implementation intentions (IIs) on physical activity and body weight among inactive obese older adults.
At baseline, 101 obese (classes I and II) older adults were randomised to an experimental or a control condition. IIs were delivered in the experimental condition in addition to the common intervention activities. Physical activity (primary outcome) was assessed by means of pedometers. The effect of IIs on body weight (secondary outcome) was also evaluated.
No main effects for IIs were observed for all outcomes (ps > 0.21). A significant time × condition interaction was observed for the number of steps per day (p = 0.01). At the 6-month follow-up, the improvement in physical activity was greater among participants in the experimental condition (d = 0.59). None of the measured cognitions moderated or mediated IIs.
RESULTS suggest that IIs could be appropriate to favour the maintenance of physical activity among inactive obese older adults. However, this technique seems to have limited impacts over and above common intervention activities on weight loss.
身体活动是健康老龄化和肥胖管理的关键因素。本研究旨在测试实施意向（IIs）对不活跃肥胖老年人群体身体活动和体重的影响。
在基线时，101 名肥胖（I 级和 II 级）老年人被随机分配到实验组或对照组。实验组除了常规干预活动外，还提供了实施意向。通过计步器评估身体活动（主要结果）。还评估了实施意向对体重（次要结果）的影响。
对于所有结果，实施意向均未表现出主要影响（p>0.21）。每天步数的时间×条件交互作用显著（p=0.01）。在 6 个月的随访中，实验组参与者的身体活动改善幅度更大（d=0.59）。未测量的认知因素没有调节或中介实施意向。
结果表明，实施意向可能适合促进不活跃肥胖老年人群体保持身体活动。然而，与常规干预活动相比，这种技术对体重减轻的影响似乎有限。
