EXPLANATION OF VIGOROUS PHYSICAL-ACTIVITY DURING 2 YEARS USING SOCIAL-LEARNING VARIABLES
EXPLANATION OF VIGOROUS PHYSICAL-ACTIVITY DURING 2 YEARS USING SOCIAL-LEARNING VARIABLES
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DOI：
10.1016/0277-9536(92)90063-v
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发表时间：
1992-01-01
影响因子：
5.4
通讯作者：
BARRINGTON, E
中科院分区：
文献类型：
--
作者：
SALLIS, JF;HOVELL, MF;BARRINGTON, E
本研究在24个月的时间内，对社区成年人样本进行了剧烈体育活动的决定因素研究。社会学习理论预测，决定因素和行为之间的因果关系是双向的，行为及其影响都是随着时间的推移而变化的。因此，动态变量预计将占更多的运动变化比静态基线变量的方差。超过86%的基线邮件调查的受访者在24个月后完成了后续调查，最终样本为1739。两个身体活动的变化指数进行了调整，基线运动和人口统计学变量，使社会学习变量的影响可以被隔离。在两步分层回归分析中，身体活动指标回归到21个静态和6个动态自变量。基线自我效能是两个因变量运动变化的重要预测因子。四个动态的社会学习变量显着相关的运动变化措施：自我效能感，感知障碍，家庭支持，朋友的支持。社会学习变量在24个月的运动变化中占12.3-15.5%。研究结果为行为和决定因素之间的双向因果关系提供了强有力的支持，并提出了有待实验研究检验的假设。
This study examined determinants of vigorous physical activity in a community sample of adults over a 24-month period. Social learning theory predicts that causal relationships between determinants and behavior are bidirectional, and both the behavior and its influences are subject to change over time. Thus, dynamic variables were expected to account for more variance in exercise change than static baseline variables. Over 86% of respondents to the baseline mail survey completed follow-up surveys 24 months later, yielding a final sample of 1739. Two physical activity change indices were constructed that were adjusted for baseline exercise and demographic variables, so that the effects of social learning variables could be isolated. In a two-step hierarchical regression analysis, physical activity measures were regressed onto 21 static and six dynamic independent variables. Baseline self-efficacy was a significant predictor of exercise change for both dependent variables. Four dynamic social learning variables were significantly associated with both exercise change measures: self-efficacy, perceived barriers, family support, and friend support. Social learning variables accounted for 12.3-15.5% of the variance in exercise change over 24 months. The results provide strong support for bidirectional causation between behavior and determinants and suggest hypotheses to be tested in experimental studies.