J Phys Act Health. 2019 Apr 1;16(4):274-280. doi: 10.1123/jpah.2018-0162. Epub 2019 Mar 8.
Entering college is associated with significant lifestyle changes and the potential adoption of a lifelong lifestyle. This study examined the longitudinal relationship between physical activity (PA) and fruit and vegetable consumption (FVC) in the hopes that findings could inform student health promotion.
A total of 369 undergraduate students provided complete responses to demographic, PA, and FVC items via an online survey 3 times over a 6-month period. Random intercept cross-lagged panel modeling examined the association between PA and FVC.
Models demonstrated a strong fit for both moderate PA and vigorous PA. In both models, FVC, but not PA, was stable across the 3 waves. Neither model revealed a temporal association between PA and FVC. Unlike the moderate PA model, the vigorous PA model revealed a strong positive association between trait-like vigorous PA and trait-like FVC.
The stability of FVC over time reinforces the importance of facilitating the adoption and maintenance of healthy dietary behaviors among college students, whereas the instability of PA over time highlights the importance of promoting students' PA year round. The absence of a temporal link between PA and FVC indicates that promotion of one behavior should not be assumed to result in improvement of the other.
进入大学与生活方式的重大变化以及潜在的终身生活方式的采用有关。本研究通过在线调查，在 6 个月内进行了 3 次调查，调查了 369 名大学生的体力活动（PA）和水果和蔬菜摄入量（FVC）之间的纵向关系，以期为学生健康促进提供信息。
共有 369 名本科生通过在线调查在 3 次调查中完整回答了人口统计学、PA 和 FVC 项目。随机截距交叉滞后面板模型检查了 PA 和 FVC 之间的关联。
模型对中等 PA 和剧烈 PA 都具有很好的拟合度。在两个模型中，FVC 在 3 个波次中都是稳定的，但 PA 却不稳定。两个模型都没有揭示出 PA 和 FVC 之间的时间关联。与中等 PA 模型不同，剧烈 PA 模型显示了特质性剧烈 PA 和特质性 FVC 之间的强烈正相关。
FVC 随时间的稳定性强调了促进大学生养成和维持健康饮食行为的重要性，而 PA 随时间的不稳定性则突出了全年促进学生 PA 的重要性。PA 和 FVC 之间不存在时间关联表明，促进一种行为不应被认为会导致另一种行为的改善。
