Scarapicchia Tanya M F, Sabiston Catherine M, O'Loughlin Erin, Brunet Jennifer, Chaiton Michael, O'Loughlin Jennifer L
University of Toronto, 55 Harbord St., Toronto, Ontario M5S 2W6, Canada.
Centre de recherche CHUM, University of Montreal, 3850 Saint-Urbain Street, Montreal, Quebec H2W 1T7, Canada; Concordia University, 7141 Sherbrooke West, Montreal, Quebec H4B 1R6, Canada.
Prev Med. 2014 Sep;66:45-8. doi: 10.1016/j.ypmed.2014.05.017. Epub 2014 May 28.
To test if motivational regulations (i.e., amotivation, external, introjected, identified, and intrinsic) mediate the association between depression symptoms and moderate-to-vigorous physical activity (MVPA) in young adults.
A total of 319 young adults from Montreal, Quebec participating in the Nicotine Dependence in Teens (NDIT) study provided self-report data on depression symptoms at age 20 (SD=0.7 years) and motivational regulations at age 24 (SD=0.7 years). MVPA was assessed using a self-report questionnaire at age 20 (i.e., at the same time motivation was measured) and using accelerometers one month later. Multiple mediation analysis with bootstrapping was employed to analyze the data.
Controlling for age, sex and self-reported MVPA at age 20 years; introjected regulation was a significant mediator of the association between depression symptoms and MVPA (R(2) adj=0.12; point estimate=-0.0011; BCa CI=-0.15 to -0.01).
Depression symptoms may undermine controlling forms of motivation, resulting in decreased MVPA. Intervention strategies may be needed to address depression symptoms in young adults to promote sustained MVPA.
检验动机调节（即无动机、外部动机、内摄动机、认同动机和内在动机）是否介导了年轻成年人抑郁症状与中等至剧烈身体活动（MVPA）之间的关联。
来自魁北克省蒙特利尔市的319名参与青少年尼古丁依赖（NDIT）研究的年轻成年人提供了关于其20岁时抑郁症状（标准差=0.7岁）和24岁时动机调节的自我报告数据。MVPA在20岁时（即与测量动机同时）通过自我报告问卷进行评估，并在一个月后使用加速度计进行评估。采用带有自抽样法的多重中介分析来分析数据。
在控制了年龄、性别和20岁时自我报告的MVPA后；内摄调节是抑郁症状与MVPA之间关联的显著中介因素（调整后的R²=0.12；点估计=-0.0011；偏差校正的95%置信区间=-0.15至-0.01）。
抑郁症状可能会破坏控制性的动机形式，导致MVPA减少。可能需要采取干预策略来解决年轻成年人的抑郁症状，以促进持续的MVPA。
