Sabiston Catherine M, Crocker Peter R E
McGill University, Montreal, Quebec, Canada.
J Adolesc Health. 2008 Jan;42(1):64-72. doi: 10.1016/j.jadohealth.2007.08.005. Epub 2007 Nov 28.
This study tested a comprehensive model of physical activity and healthy eating behavior.
A sample of older adolescents (boys n = 206, girls n = 326) volunteered to complete a scientifically supported questionnaire assessing physical activity and healthy eating perceptions of competence, values, and behaviors once during class time.
Confirmatory factor analysis suggested the data fit the model well. Tests of group differences supported factorial invariance, and revealed higher physical activity perceptions of competence, value, and behavior as well as lower healthy diet value and behavior for adolescent boys compared with girls. Perceptions of competence for healthy diet were also higher among boys. Path modeling demonstrated a good model fit, whereby behavior-specific perceptions of competence and values were significant correlates of physical activity for the total sample and subsamples of boys and girls (R(2) = .41-.53). Perceptions of competence and values were also significant correlates of healthy diet for the total sample (R(2) = .34) and boys (R(2) = .42). Subjective values were significant correlates of healthy diet for girls (R(2) = .30). Structural invariance suggested that the models were not significantly different for adolescent boys and girls.
These results demonstrate the saliency of the comprehensive model in understanding physical activity and healthy eating behaviors among older adolescents. Further tests of the model are needed to advance theory exploring both physical activity and healthy eating behaviors, and to inform intervention strategies targeting adolescent health.
本研究检验了一个关于体育活动和健康饮食行为的综合模型。
一组年龄较大的青少年（男孩n = 206，女孩n = 326）自愿在课堂上完成一份经过科学验证的问卷，该问卷评估了体育活动以及对能力、价值观和行为的健康饮食认知。
验证性因素分析表明数据与模型拟合良好。组间差异检验支持了因素不变性，并显示与女孩相比，青少年男孩对体育活动的能力、价值和行为认知更高，而对健康饮食的价值和行为认知更低。男孩对健康饮食的能力认知也更高。路径模型显示模型拟合良好，即特定行为的能力和价值观认知是总样本以及男孩和女孩子样本体育活动的显著相关因素（R² = 0.41 - 0.53）。能力和价值观认知也是总样本（R² = 0.34）和男孩（R² = 0.42）健康饮食的显著相关因素。主观价值观是女孩健康饮食的显著相关因素（R² = 0.30）。结构不变性表明该模型在青少年男孩和女孩中没有显著差异。
这些结果证明了综合模型在理解年龄较大青少年的体育活动和健康饮食行为方面的显著性。需要对该模型进行进一步测试，以推进对体育活动和健康饮食行为的理论探索，并为针对青少年健康的干预策略提供信息。
