The Role of Self-Efficacy and Friend Support on Adolescent Vigorous Physical Activity
The Role of Self-Efficacy and Friend Support on Adolescent Vigorous Physical Activity
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DOI：
10.1177/1090198116648266
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发表时间：
2017-02-01
影响因子：
4.2
通讯作者：
Schwarzer, Ralf
中科院分区：
文献类型：
--
作者：
Hamilton, Kyra;Warner, Lisa M.;Schwarzer, Ralf
目标。身体活动，包括某种形式的剧烈运动，是年轻人健康生活方式的关键组成部分。自我效能感和社会支持被认为是体力活动的关键决定因素；然而，反映这两个因素相互作用的机制还不是很清楚。这项研究的目的是检验社会认知理论的观点，即自我效能感与转化为行为的意图有关，并调查朋友支持和自我效能感是否相互协同、干扰或补偿，以预测青少年的剧烈体育活动。青少年是体力活动迅速减少的风险人群。方法。在两个时间点对226名12至16岁的学生进行了调查。在条件过程分析中，朋友支持和体育锻炼自我效能感被指定为意图的交互预测因子。后者被指定为自我效能感和后来剧烈的体力活动之间的中介，控制了性别和年龄。结果。自我效能感是意图的主要预测因子，其次是朋友支持，以及支持和自我效能之间的交互作用。在高自我效能感的青少年中，意图与支持无关。在自我效能感低的人中，接受朋友支持在一定程度上弥补了自我效能感的缺乏。自我效能感对剧烈运动的影响受意图的中介作用。结论。青少年剧烈体力活动通过意向自我效能感间接预测，朋友支持水平的中介作用进一步减弱，表明朋友支持对自我效能感缺失有一定的缓冲作用。
Objectives. Physical activity, including some form of vigorous activity, is a key component of a healthy lifestyle in young people. Self-efficacy and social support have been identified as key determinants of physical activity; however, the mechanism that reflects the interplay of these two factors is not well understood. The aim of the current study was to test social cognitive theory's notion that self-efficacy relates to intention that translates into behavior and to investigate whether friend support and self-efficacy synergize, interfere, or compensate for one another to predict vigorous physical activity in adolescentsa population at risk of rapid decreases in physical activity. Method. A survey at two points in time was conducted in 226 students aged 12 to 16 years. In a conditional process analysis, friend support and physical activity self-efficacy were specified as interacting predictors of intention. The latter was specified as a mediator between self-efficacy and later vigorous physical activity, controlling for sex and age. Results. Self-efficacy emerged as the dominant predictor of intention, followed by friend support, and an interaction between support and self-efficacy. In adolescents with high self-efficacy, intention was independent of support. In those with low self-efficacy, receiving friend support partly compensated for lack of self-efficacy. The effect of self-efficacy on vigorous physical activity was mediated by intention. Conclusions. Adolescent vigorous physical activity was indirectly predicted by self-efficacy via intention, and this mediation was further moderated by levels of friend support, indicating that friend support can partly buffer lack of self-efficacy.