Maier Janne H, Barry Ronald
University of Alaska Fairbanks, P.O. Box 757500, Fairbanks, AK 99775, USA ; Institute of Arctic Biology, University of Alaska Fairbanks, P.O. Box 757500, Fairbanks, AK 99775, USA ; Center for Alaska Native Health Research, University of Alaska Fairbanks, P.O. Box 757500, Fairbanks, AK 99775, USA.
University of Alaska Fairbanks, P.O. Box 757500, Fairbanks, AK 99775, USA ; Department of Mathematical Sciences, University of Alaska Fairbanks, P.O. Box 757500, Fairbanks, AK 99775, USA.
J Nutr Metab. 2015;2015:805065. doi: 10.1155/2015/805065. Epub 2015 Oct 11.
Background. Obesity in youth is highly prevalent. Physical activity and diet are influential in obesity development. However, there is a knowledge gap regarding links between activity and diet quality and their combined influence on obesity during adolescence. Objectives. We used five years of data from 2379 adolescent girls in the National Heart Lung and Blood Institute Growth and Health Study to evaluate the association between physical activity and diet quality during adolescence and to assess both as correlates of obesity. Design. Diet, activity, and body composition measures were evaluated pairwise for correlation. A canonical correlation analysis was used to evaluate relationships within and between variable groups. All statistics were examined for trends over time. Results. We found positive correlations between physical activity and diet quality that became stronger with age. Additionally we discovered an age-related decrease in association between obesity correlates and body composition. Conclusion. These results suggest that while health behaviors, like diet and activity, become more closely linked during growth, obesity becomes less influenced by health behaviors and other factors. This should motivate focus on juvenile obesity prevention capitalizing on the pliable framework for establishing healthy diet and physical activity patterns while impact on body composition is greatest.
背景。青少年肥胖现象极为普遍。身体活动和饮食对肥胖的发展有影响。然而，关于青春期身体活动与饮食质量之间的联系及其对肥胖的综合影响，目前存在知识空白。目标。我们利用美国国立心肺血液研究所生长与健康研究中2379名青春期女孩的五年数据，评估青春期身体活动与饮食质量之间的关联，并将二者作为肥胖的相关因素进行评估。设计。对饮食、活动和身体成分测量值进行两两相关性评估。采用典型相关分析来评估变量组内部和之间的关系。对所有统计数据进行随时间变化趋势的检验。结果。我们发现身体活动与饮食质量之间呈正相关，且这种相关性随年龄增长而增强。此外，我们还发现肥胖相关因素与身体成分之间的关联随年龄增长而减弱。结论。这些结果表明，虽然饮食和活动等健康行为在成长过程中联系更为紧密，但肥胖受健康行为和其他因素的影响却越来越小。这应促使人们将重点放在青少年肥胖预防上，利用建立健康饮食和身体活动模式的灵活框架，因为此时对身体成分的影响最大。
