Department of Nutrition and Food Science, University of Kentucky, Lexington, KY, USA.
J Nutr Educ Behav. 2010 May-Jun;42(3):161-7. doi: 10.1016/j.jneb.2009.03.001. Epub 2010 Feb 6.
To examine changes in motivation and the relationship of motivation to adherence to self-monitoring and weight loss in a 16-week Internet behavioral weight-loss intervention.
Two-group randomized design.
This study was conducted over the Internet.
Sixty-six women, ages 22-65, with a body mass index (BMI) between 25 and 40, and with a home computer with Internet access, participated.
These data are from an Internet behavioral weight-loss program in which all participants received a face-to-face initial session followed by the 16-week Internet program.
Adherence to self-monitoring and weight loss were the main outcome measures.
Linear regression and mediation analysis using the Baron and Kenny method were conducted.
Autonomous motivation increased initially and remained high for those who ultimately achieved a 5% weight loss, but declined over time for participants who did not achieve a 5% weight loss. Autonomous motivation at 4 weeks was a predictor of adherence to self-monitoring and 16-week weight loss. Adherence mediated the relationship between autonomous motivation and weight loss.
These results suggest that autonomous motivation may be a promising intervention target for promoting program procedure adherence and weight loss.
研究动机变化及其与自我监测和体重减轻的关系，观察其在为期 16 周的网络行为减肥干预中的变化。
两组随机设计。
本研究在互联网上进行。
66 名年龄在 22-65 岁之间的女性，体重指数（BMI）在 25 到 40 之间，且拥有家用电脑和网络接入设备。
这些数据来自于一个网络行为减肥项目，所有参与者都接受了一次面对面的初始会议，然后是为期 16 周的网络项目。
自我监测和体重减轻的依从性是主要观察指标。
采用 Baron 和 Kenny 方法的线性回归和中介分析。
对于那些最终体重减轻 5%的人来说，自主动机最初增加并保持较高水平，但对于没有减轻 5%体重的参与者来说，自主动机随着时间的推移而下降。4 周时的自主动机是自我监测依从性和 16 周体重减轻的预测因素。依从性中介了自主动机与体重减轻之间的关系。
这些结果表明，自主动机可能是促进项目程序依从性和体重减轻的一个有前途的干预目标。
